@misc{WangWangPyczaketal., author = {Wang, Li and Wang, Yihao and Pyczak, Florian and Oehring, Michael and Song, Min and Liu, Yong}, title = {Revealing complex planar defects and their interactions at atomic resolution in a Laves phase containing Co-base superalloy}, series = {Acta Materialia}, volume = {264}, journal = {Acta Materialia}, publisher = {Elsevier BV}, issn = {1359-6454}, doi = {10.1016/j.actamat.2023.119568}, pages = {1 -- 20}, language = {en} } @misc{WangWangLiangetal., author = {Wang, Li and Wang, Yihao and Liang, Xiaopeng and Liu, Bin and He, Junyang and Oehring, Michael and Pyczak, Florian and Liu, Yong}, title = {Revealing the unique evolution and splitting behavior of carbides at atomic-scale in TiAl alloys : the role of elastic interactions and chemical fluctuations}, series = {Acta materialia}, volume = {296}, journal = {Acta materialia}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {1359-6454}, doi = {10.1016/j.actamat.2025.121277}, pages = {1 -- 17}, abstract = {Cubic perovskite-Ti3AlC carbides are essential strengthening particles in TiAl alloys, especially for application above 800 °C where coarsening is expected to occur. However, these carbides can decompose into small sub-particles upon extended annealing, and the underlying atomic-scale mechanisms, especially structural and compositional changes, driving this unique splitting remain unclear. This study revisits this behavior in a Ti-45Al-5Nb-0.75C alloy utilizing probe-corrected transmission electron microscopy, atom probe tomography and first-principle calculations. The results reveal that the elastic interactions significantly influence carbide evolution. While needle-like carbides transform to intact plates during aging, those in high-density regions tend to coalesce or align along elastically softest γ-matrix directions, forming low-energy plate-like carbide conglomerates. With extended annealing, periodic chemical fluctuations driven by lattice misfit, especially along the needles induce splitting. Simultaneously, a γi-phase with a larger tetragonality and a 90°-rotated c-axis relative to the γ matrix emerges between the sub-particles, which exhibits near-zero lattice mismatch with carbides along [001], combined with mass-center shifts of carbides, further stabilizing the split configurations. This study provides atomic-scale insights into the evolution and stability of strengthening precipitates in systems with tetragonal misfit, and offers new strategies for improving creep properties of TiAl alloys by tailoring carbide configurations.}, language = {en} } @misc{LiPyczakOehringetal., author = {Li, Yuzhi and Pyczak, Florian and Oehring, Michael and Wang, Li and Paul, Jonathan and Lorenz, Uwe and Yao, Zekun}, title = {Thermal Stability of gamma' phase in long-term aged Co-Al-W alloys}, series = {Journal of Alloys and Compounds}, volume = {729}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, pages = {266 -- 276}, language = {en} } @misc{WangOehringLietal., author = {Wang, Li and Oehring, Michael and Li, Yuzhi and Song, Lin and Liu, Yon and Stark, Andreas and Lorenz, Uwe and Pyczak, Florian}, title = {Microstructure, phase stability and element partitioning of γ/γʹ Co-9Al-9W-2X alloys in different annealing conditions}, series = {Journal of Alloys and Compounds}, volume = {787}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, pages = {594 -- 605}, language = {en} } @misc{LiPyczakStarketal., author = {Li, Yuzhi and Pyczak, Florian and Stark, Andreas and Wang, Li and Oehring, Michael and Paul, Jonathan and Lorenz, Uwe}, title = {Temperature dependence of misfit in different Co-Al-W ternary alloys measured by synchrotron X-ray diffraction}, series = {Journal of Alloys and Compounds}, volume = {819}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, pages = {9}, language = {en} } @misc{LiWangLiangetal., author = {Li, Longjun and Wang, Li and Liang, Zhida and He, Junyang and Qiu, Jingwen and Pyczak, Florian and Song, Min}, title = {Effects of Ni and Cr on the high-temperature oxidation behavior and mechanisms of Co- and CoNi-base superalloys}, series = {Materials and Design}, volume = {224}, journal = {Materials and Design}, issn = {1873-4197}, doi = {10.1016/j.matdes.2022.111291}, abstract = {The high-temperature oxidation behaviors of Co- and CoNi-base alloys with different Ni and Cr additions were investigated by isothermal oxidation in air at 900 and 1000 °C. The structure, composition, and element distribution in the three layers within the oxide scales in different alloys have been explored in detail by electron microscopy, especially with regard to the fine oxide particles in the intermediate layer. Based on the microstructure and phase constitution of the oxide scales, the synergetic effects of alloying elements on the oxidation mechanisms and resistance have been elucidated in detail with the aid of CALPHAD calculation.}, language = {en} } @article{JamaludinNordinLietal., author = {Jamaludin, Farah Hidayah and Nordin, Nur Syahirra and Li, Xinge and Wong, Jie-Wei and Lim, Zhixian and Wang, Lei and Ma, Chunxin and Zhao, Qian and Wong, Tuck-Whye and Neffe, Axel T. and Li, Tiefeng}, title = {Recent Advances in the Field of Shape-Memory Polymer from Bio-Based Precursors: Review and Perspective}, series = {Polymer Reviews}, volume = {65}, journal = {Polymer Reviews}, number = {1}, publisher = {Informa UK Limited}, issn = {1558-3724}, doi = {10.1080/15583724.2024.2427827}, pages = {199 -- 249}, abstract = {Shape-memory polymers (SMPs) are predominantly derived from nonrenewable resources due to their low production cost, wide availability, and refined techniques for processing and tailoring SMP properties. However, the heavy reliance on these nonrenewable resources poses significant concerns regarding resource depletion and the long-term sustainability of the technology. As petroleum-based resources, which have traditionally fueled the polymer industry, become increasingly scarce, it is imperative to develop bio-based SMPs. This shift is essential not just for resource conservation but to ensure the continued viability and sustainability of SMP technology in the face of dwindling petroleum supplies. This review provides an overview of bio-based SMPs, which are synthesized from renewable precursors or through chemical variation and functionalization of biopolymers. The molecular mechanism and design strategy for the shape-memory effect (SME), syntheses, unique characteristics and shape-memory performance for these bio-based SMPs are covered. Furthermore, this review highlights novel insights and proposes promising directions for the development of sustainable SMPs with comparable performance to their nonrenewable counterparts. By focusing on bio-based alternatives, this work aims to motivate the exploration and advancement of next-generation sustainable SMPs.}, language = {en} } @misc{LiLokNgoetal., author = {Li, Siyang and Lok, Tow-Jie and Ngo, Shi-Han and Xue, Yaoting and Miao, Zhikun and Feng, Tao and Wang, Lei and Wong, Jie-Wei and Low, Jiatee and Lim, Kai-Yi and Woon, Min-Rou and Neffe, Axel T. and Wong, Tuck-Whye and Li, Tiefeng and Yang, Xuxu and Yang, Wei}, title = {A water-recyclable, robust, and self-healing sugar-based supramolecular network enabled by Maillard-analogous initialization of polymerization}, series = {Materials horizons}, volume = {13}, journal = {Materials horizons}, number = {1}, publisher = {Royal Society of Chemistry (RSC)}, address = {Cambridge}, issn = {2051-6347}, doi = {10.1039/D5MH01828E}, pages = {219 -- 232}, abstract = {Crosslinked functional polymers exhibit exceptional mechanical and chemical properties critical for applications spanning biomedical engineering, advanced adhesives, and self-healing materials. However, challenges in recycling, either due to irreversible crosslinks or, in the case of covalent adaptable networks (CANs), limited solid-state plasticity that typically requires catalysts, significantly restrict sustainability. To address these limitations, we present a novel water-mediated polymerization strategy inspired by the radical-generating mechanism of the Maillard reaction, utilizing maltose as both an initiator and a functional side group in a simple, catalyst-free, aqueous reaction with acrylamide (AAm). This mild, one-pot reaction occurs below 100 °C, forming adaptively functionalized supramolecular networks (AFSNs) that form supramolecular networks through hydrogen bonding and display dynamic imine linkages to the maltose side chains supporting self-healing and re-shaping. These elastomers are characterized by impressive mechanical strength (up to 5 MPa tensile strength), high elongation (up to 1000\%), notable fracture energy (36 kJ m-2), robust adhesive performance (up to 4.8 MPa), and rapid self-healing capability at room temperature. Crucially, the elastomer's supramolecular network can be fully and repeatedly dissolved and reprocessed using only water, preserving mechanical integrity without chemical degradation. This sustainable approach provides a practical solution for synthesizing and recycling high-performance crosslinked materials while eliminating environmental hazards, guiding the future development of green polymer chemistry and functional material design.}, language = {en} } @phdthesis{Wang, author = {Wang, Li}, title = {Millimeter-wave Integrated Circuits in SiGe:C Technology}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-5993}, language = {en} } @misc{WangPyczakZhangetal., author = {Wang, Li and Pyczak, Florian and Zhang, Jian and Lou, Langhong and Singer, Robert F.}, title = {Effect of eutectics on plastic deformation and subsequent recrystallization in the single crystal nickel base superalloy CMSX-4}, series = {Materials Science and Engineering A}, journal = {Materials Science and Engineering A}, number = {532}, issn = {1873-4936}, pages = {487 -- 492}, language = {en} } @misc{GabrischStarkSchimanskyetal., author = {Gabrisch, Heike and Stark, Andreas and Schimansky, Frank-Peter and Wang, Li and Schell, Norbert and Pyczak, Florian}, title = {Carbides in Ti-45Al-5Nb alloys with different carbon contents}, series = {Intermetallics}, journal = {Intermetallics}, number = {33}, issn = {0966-9795}, pages = {44 -- 53}, language = {en} } @misc{WangPyczakZhangetal., author = {Wang, Li and Pyczak, Florian and Zhang, Jian and Singer, Robert F.}, title = {On the role of eutectics during recrystallization in a single crystal nickel-base superalloy - CMSX-4}, series = {International Journal of Materials Research}, volume = {100}, journal = {International Journal of Materials Research}, number = {8}, issn = {2195-8556}, pages = {1046 -- 1051}, language = {en} } @inproceedings{WangPyczakGabrischetal., author = {Wang, Li and Pyczak, Florian and Gabrisch, Heike and Lorenz, Uwe and M{\"u}nch, Mathias and Schimansky, Frank-Peter and Schreyer, Andreas and Stark, Andreas}, title = {Effects of Carbon Content, Annealing Condition and Internal Defects on the nucleation, growth and coarsening of P-type Carbides in High Niobium Containing TiAl Alloys}, series = {Advanced structural and functional intermetallic-based alloys, November 30 - December 5, 2014, Boston, Massachusetts, USA}, booktitle = {Advanced structural and functional intermetallic-based alloys, November 30 - December 5, 2014, Boston, Massachusetts, USA}, publisher = {Curran}, address = {Red Hook, NY}, isbn = {978-1-5108-0634-4}, pages = {61 -- 66}, language = {en} } @misc{WangGabrischLorenzetal., author = {Wang, Li and Gabrisch, Heike and Lorenz, Uwe and Schimansky, Frank-Peter and Schreyer, Andreas and Stark, Andreas and Pyczak, Florian}, title = {Nucleation and thermal stability of carbide precipitates in high Nb containing TiAl alloys}, series = {Intermetallics}, volume = {66}, journal = {Intermetallics}, issn = {0966-9795}, doi = {10.1016/j.intermet.2015.07.001}, pages = {111 -- 119}, language = {en} } @misc{ZangLinLietal., author = {Zang, Yufeng and Lin, Nanying and Li, Yaping and Wang, Xiadon and Kang, Junyong and Wilks, Regan G. and B{\"a}r, Marcus and Mu, Rui}, title = {The isotype ZnO/SiC heterojunction prepared by molecular beam epitaxy - A chemical inert interface with significant band discontinuities}, series = {Scientific reports}, volume = {6}, journal = {Scientific reports}, issn = {2045-2322}, doi = {10.1038/srep23106}, pages = {23106}, language = {en} } @misc{WangLorenzMuenchetal., author = {Wang, Li and Lorenz, Uwe and M{\"u}nch, Mathias and Stark, Andreas and Pyczak, Florian}, title = {Influence of alloy composition and thermal history on carbide precipitation in γ-based TiAl alloys}, series = {Intermetallics}, volume = {89}, journal = {Intermetallics}, issn = {0966-9795}, pages = {32 -- 39}, language = {en} } @misc{WangZenkStarketal., author = {Wang, Li and Zenk, Carolin and Stark, Andreas and Felfer, Peter and Gabrisch, Heike and G{\"o}ken, Mathias and Lorenz, Uwe and Pyczak, Florian}, title = {Morphology evolution of Ti3AlC carbide precipitates in high Nb containing TiAl alloys}, series = {Acta Materialia}, journal = {Acta Materialia}, number = {137}, issn = {1359-6454}, pages = {36 -- 44}, language = {en} } @misc{WangPyczakPauletal., author = {Wang, Li and Pyczak, Florian and Paul, Jonathan and Oehring, Michael and Lorenz, Uwe and Yao, Zekun and Ning, Yongquan}, title = {Rafting of γ′ precipitates in a Co-9Al-9W superalloy during compressive creep}, series = {Materials Science and Engineering}, volume = {719}, journal = {Materials Science and Engineering}, issn = {0921-5093}, doi = {10.1016/j.msea.2018.02.017}, pages = {43 -- 48}, language = {en} } @misc{WangOehringLorenzetal., author = {Wang, Li and Oehring, Michael and Lorenz, Uwe and Stark, Andreas and Pyczak, Florian}, title = {New insights into perovskite-Ti3AlC precipitate splitting in a Ti-45Al-5Nb-0.75C alloy by transmission electron microscopy}, series = {Intermetallics}, volume = {100}, journal = {Intermetallics}, issn = {0966-9795}, doi = {10.1016/j.intermet.2018.06.006}, pages = {70 -- 76}, language = {en} } @misc{WangOehringLorenzetal., author = {Wang, Li and Oehring, Michael and Lorenz, Uwe and Yang, Junjie and Pyczak, Florian}, title = {Influence of alloying additions on L1₂ decomposition in γ-γʹ Co-9Al-9W-2X quaternary alloys}, series = {Scripta Materialia}, volume = {154}, journal = {Scripta Materialia}, issn = {1359-6462}, pages = {176 -- 181}, language = {en} } @misc{SongWangOehringetal., author = {Song, Lin and Wang, Li and Oehring, Michael and Hu, Xingguo and Appel, Fritz and Pyczak, Florian and Zhang, Tiebang}, title = {Evidence for deformation twinning of the D019-α2 phase in a high Nb containing TiAl alloy}, series = {Intermetallics}, volume = {109}, journal = {Intermetallics}, issn = {0966-9795}, doi = {10.1016/j.intermet.2019.03.014}, pages = {91 -- 96}, language = {en} } @misc{WangSongStarketal., author = {Wang, Li and Song, Lin and Stark, Andreas and Liu, Yong and Oehring, Michael and Lorenz, Uwe and Pyczak, Florian}, title = {Identification of Laves phases in a Zr or Hf containing γ-γ′ Co-base superalloy}, series = {Journal of Alloys and Compounds}, volume = {805}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, pages = {880 -- 886}, language = {en} } @misc{SongHuWangetal., author = {Song, Lin and Hu, Xingguo and Wang, Li and Stark, Andreas and Lazurenko, Daria V. and Lorenz, Uwe and Lin, Junpin and Pyczak, Florian and Zhang, Tiebang}, title = {Microstructure evolution and enhanced creep property of a high Nb containing TiAl alloy with carbon addition}, series = {Journal of Alloys and Compounds}, volume = {807}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, doi = {10.1016/j.jallcom.2019.151649}, pages = {11}, language = {en} } @misc{HanXuWangetal., author = {Han, Liuliu and Xu, Xiandong and Wang, Li and Pyczak, Florian and Zhou, Rui and Liu, Yong}, title = {A eutectic high-entropy alloy with good high-temperature strength-plasticity balance}, series = {Materials Research Letters}, volume = {7}, journal = {Materials Research Letters}, number = {11}, issn = {2166-3831}, pages = {460 -- 466}, language = {en} } @misc{WangOehringLiuetal., author = {Wang, Li and Oehring, Michael and Liu, Yuzhi and Lorenz, Uwe and Pyczak, Florian}, title = {Site occupancy of alloying elements in the L12 structure determined by channeling enhanced microanalysis in γ/γ' Co-9Al-9W-2X alloys}, series = {Acta Materialia}, volume = {162}, journal = {Acta Materialia}, isbn = {1359-6454}, pages = {176 -- 188}, language = {en} } @misc{SongWangZhangetal., author = {Song, Lin and Wang, Li and Zhang, Tiebang and Lin, Junpin and Pyczak, Florian}, title = {Microstructure and phase transformations of omega_o-Ti4Al3Nb based alloys after quenching and subsequent aging at intermediate temperatures}, series = {Journal of Alloys and Compounds}, volume = {821}, journal = {Journal of Alloys and Compounds}, issn = {0925-8388}, pages = {11}, language = {en} } @misc{SongAppelWangetal., author = {Song, Lin and Appel, Fritz and Wang, Li and Oehring, Michael and Hu, Xingguo and Stark, Andreas and He, Junyang and Lorenz, Uwe and Zhang, Tiebang and Lin, Junpin and Pyczak, Florian}, title = {New insights into high-temperature deformation and phase transformation mechanisms of lamellar structures in high Nb-containing TiAl alloys}, series = {Acta Materialia}, volume = {186}, journal = {Acta Materialia}, issn = {1873-2453}, doi = {10.1016/j.actamat.2020.01.021}, pages = {575 -- 586}, language = {en} } @misc{WangLiRobraetal., author = {Wang, Jian and Li, Zheng and Robra, J{\"o}rgen and Pasternak, Hartmut and Euler, Mathias}, title = {Investigation on Shear Buckling of Corrugated Web Beams with Reinforced Web Openings}, series = {ce/papers}, volume = {5}, journal = {ce/papers}, number = {4}, issn = {2509-7075}, doi = {10.1002/cepa.1800}, pages = {628 -- 634}, abstract = {Corrugated web beams are welded I-sections with thin-walled sinusoidal corrugated webs and flanges made of wide flat steel that have been developed as an alternative to steel girders with flat webs. In comparison with hot-rolled or welded I-beams with flat webs, corrugated web beams are connected with considerable material savings and fully automated production. Assuming the same load-bearing capacity, corrugated web beams are lighter than those with a flat web, since the corrugated web beams can often be loaded up to their plastic resistance without reinforcement of the web. The research on the load-bearing behavior of corrugated web beams without web openings is relatively mature. However, the resistance of corrugated web beams with reinforced web openings, as they are often used in buildings for installations, has not well experimentally been investigated, yet. This paper deals with the shear resistance of corrugated web beams with reinforced square web openings. Three specimens of different geometry with two square web openings were tested. The experiments are compared with a Finite Element Analysis by Abaqus® and with an analytical model allowing simplified calculation. Both models can relatively accurately calculate the shear resistance. The experimental and numerical results show that the increase of the shear resistance of perforated corrugated web beams depends on the wall-thickness and the steel grade of the web opening reinforcement.}, language = {en} } @misc{WangKongOehringetal., author = {Wang, Li and Kong, Yi and Oehring, Michael and Song, Min and Pyczak, Florian}, title = {Atomic site occupancy of alloying elements and Laves phase stability in γ-γ′ Co-base superalloys}, series = {Journal of Alloys and Compounds}, volume = {906}, journal = {Journal of Alloys and Compounds}, issn = {1873-4669}, doi = {10.1016/j.jallcom.2022.164261}, abstract = {The atomic site occupancy of alloying elements in the ZrCo2 and HfCo2 based Laves phases formed in the Co-9Al-9W-2Zr and Co-9Al-9W-2Hf alloys was experimentally determined by the combined techniques of energy-dispersive X-ray spectroscopy mapping with atomic resolution and the atom location by channeling enhanced microanalysis (ALCHEMI) method. The results show that both Al and W occupy the Zr site in the C15 and the Hf site in the C36 crystal structure. The atomic locations of Al and W were further confirmed by comparing calculated inelastic cross-sections with experimental ALCHEMI results. Using the determined atomic site occupancies of alloying elements, special quasirandom structure solid solution models with 192 atoms were constructed and employed in first-principles calculations. It is found theoretically that the energy of formation of the C15 structure is always lower than that of the C36 structure at 0 K in both ZrCo2 and HfCo2 phases, no matter whether Al and W are incorporated or not. However, further ab initio molecular dynamics simulations suggest that lattice vibration at finite temperature contributes significantly to the phase stability, stabilizing the C36 structure compared to the C15 type for the (Hf, Al, W)Co2 phase at finite temperature, which fits well with the experimental findings.}, language = {en} } @misc{WangLiangLiuetal., author = {Wang, Li and Liang, Xiaopeng and Liu, Bin and Oehring, Michael and Paul, Jonathan David Heaton and Liu, Jie and Song, Min and Pyczak, Florian and Liu, Yong}, title = {Stacking fault formation in perovskite Ti3AlC carbides in a TiAl based alloy during creep at 800°C}, series = {Scripta Materialia}, volume = {Vol. 222}, journal = {Scripta Materialia}, issn = {1872-8456}, doi = {10.1016/j.scriptamat.2022.115034}, language = {en} } @misc{LiZhangShietal., author = {Li, Zheng and Zhang, Qiulei and Shi, Fei and Wang, Jian and Pasternak, Hartmut}, title = {Geometric Properties of Steel Components with Stability and Fatigue Risks Using 3D-Laser-Scanning}, series = {Buildings}, volume = {14}, journal = {Buildings}, number = {1}, issn = {2075-5309}, doi = {10.3390/buildings14010168}, abstract = {Nowadays, 3D laser scanning technology is extensively employed in laboratory investigations of steel structural components, providing accurate geometric dimensions to reduce uncertainties caused by indeterminate geometry in experimental results. It is often used in conjunction with the Finite Element (FE) Method and analytical solutions, which are more accurate deterministic operators in the research on steel structures. However, establishing a common methodological framework for transferring or mapping 3D-scanned information into finite element models for complex steel structures with stability and fatigue risks remains an ongoing task. In light of this, this study has developed a 3D scanning platform capable of obtaining accurate geometric dimensions for various types of steel components. Different coordinate systems and point cloud mapping algorithms have been established for different types of components to construct actual finite element models with initial imperfections. The feasibility of the self-developed 3D scanning platform and finite element modelling has been validated through three experimental cases: weld details, steel girders, and cylindrical shells. The research findings demonstrate that the captured point cloud can be automatically processed and corrected using the developed algorithm. The scanned data can then be input into the numerical model using various mapping algorithms tailored to the specific geometric properties of the specimens. The differences between the experimental test results and the simulated results obtained from the 3D-scanned finite element models remain within a small range. The self-developed 3D scanning platform and finite element modelling technique effectively capture the actual dimensions of different steel components, enabling the prediction of their stability and fatigue risks through numerical simulations.}, language = {en} } @misc{WangLiEuler, author = {Wang, Jian and Li, Zheng and Euler, Mathias}, title = {Shear force resistance of plate girders with trapezoidally corrugated webs and reinforced web openings}, series = {Nordic Steel Construction Conference 2024, The 15th Nordic Steel Construction Conference, June 26-28, 2024, Lule{\aa}, Sweden}, journal = {Nordic Steel Construction Conference 2024, The 15th Nordic Steel Construction Conference, June 26-28, 2024, Lule{\aa}, Sweden}, doi = {10.5281/zenodo.12209595}, pages = {10}, abstract = {Corrugated web beams are an alternative to steel girders with flat webs. They consist of a welded Isection with a thin-walled trapezoidally corrugated web and flanges made of wide flat steel. In comparison with hot-rolled or welded I-beams with flat webs, corrugated web beams offer significant material savings and are produced fully automated. Assuming the same load-bearing capacity, corrugated web beams are lighter than those with a flat web, since the corrugated web beams can often be loaded up to their plastic resistance without reinforcement of the web. Research on the loadbearing behaviour of corrugated web beams without web openings is well-established. However, the resistance of corrugated web beams with reinforced web openings, which are necessary for installations in buildings, has not been well investigated experimentally yet. This paper examines the shear force resistance of trapezoidally corrugated web beams with reinforced square web openings. Two beam-like specimens with the same geometry but differently reinforced web openings were tested. The experimental results are compared with a Finite Element Analysis using Abaqus® and with an analytical model that allows a simplified calculation. The comparison identifies how the wall thickness of the web opening reinforcement affects the shear force resistance of perforated corrugated web beams.}, language = {en} } @misc{WangEulerPasternaketal., author = {Wang, Jian and Euler, Mathias and Pasternak, Hartmut and Li, Zheng and Krausche, Thomas and Launert, Benjamin}, title = {Bending capacity of single and double-sided welded I-section girders: Part 1: Experimental investigations}, series = {Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems : Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa}, journal = {Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems : Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa}, publisher = {CRC Press}, address = {Boca Raton}, isbn = {978-1-00-334845-0}, doi = {10.1201/9781003348443-159}, pages = {975 -- 980}, abstract = {The lateral-torsional buckling resistance of welded steel girders is affected by their residual stresses and geo-metric imperfections. Generally, both influences are mainly controlled by the manufacturing process, in partic-ular the welding of the girder. This paper presents experimental investigations on four laterally unbraced welded steel girders with thin-walled I-sections, whose flange-to-web junctions are welded from one or two sides to evaluate the fabrication influence. The investigations include lateral-torsional buckling tests under combined bending and torsion loading caused by three-point bending due to an eccentric vertical single force. The geometric imperfections of the welded test girders are determined by 3D laser scanning. The test results show that the influence of the geometric imperfections and the residual stresses on the lateral-torsional buck-ling resistance is limited for the tested girders.}, language = {en} } @misc{LiXuGeissleretal., author = {Li, Zheng and Xu, Siying and Geißler, Karsten and Wang, Jian and Pasternak, Hartmut}, title = {Developed numerical Analysis of Residual Stress caused by Welding and Cutting in Steel Structures}, series = {ce/papers}, volume = {6}, journal = {ce/papers}, number = {3-4}, issn = {2509-7075}, doi = {10.1002/cepa.2601}, pages = {1507 -- 1512}, abstract = {The welding and flame-cutting process in the steel construction are commonly used, especially for the bridge structure. Some experiments about welding and cutting have been done separately by some researchers. The results from the experiments were also compared with the results from the numerical simulation under 3D or 2D models. The agreements between those results are as good as they predicted. Therefore, the numerical simulation is a better way to analyze the quality of the steel construction after welding and cutting without time-consuming and a large amount of cost. But there are only a few research about the numerical simulation and the some of them are aimed to verify the experiments. In this study, the calculation about the residual stresses after welding and thermo-cutting are considered from 3D-model into 2D-Model. The heat source model is simply regarded as curves of time and welding energy with the algorithm methods. And no matter the change of the parameters of the model and the heat source, the heat transfer and the residual stresses can be calculated with the 2D models as fast as possible. By the means of the finite element software Abaqus, the I-profiles are easy to receive the job results with the input parameters. The influence of the welding and cutting process are visual and direct.}, language = {en} } @misc{WangLiEuler, author = {Wang, Jian and Li, Zheng and Euler, Mathias}, title = {Investigation on shear buckling of steel welded I-section beams with reinforced web openings}, series = {ce/papers}, volume = {6}, journal = {ce/papers}, number = {3-4}, doi = {10.1002/cepa.2361}, pages = {1754 -- 1760}, language = {en} } @misc{WangLiPasternaketal., author = {Wang, Jian and Li, Zheng and Pasternak, Hartmut and Euler, Mathias}, title = {Shear Buckling Behavior of Tapered Steel Plate Girders with Sinusoidally Corrugated Webs}, series = {ce/papers}, volume = {6}, journal = {ce/papers}, number = {3-4}, issn = {2509-7075}, doi = {10.1002/cepa.2534}, pages = {1787 -- 1792}, language = {en} } @misc{WangLiPasternaketal., author = {Wang, Jian and Li, Zheng and Pasternak, Hartmut and Euler, Mathias}, title = {Querkrafttragf{\"a}higkeit von Wellstegtr{\"a}gern mit versteiften quadratischen Steg{\"o}ffnungen}, series = {Bauingenieur}, volume = {98}, journal = {Bauingenieur}, number = {11}, issn = {0005-6650}, doi = {10.37544/0005-6650-2023-11-31}, pages = {343 -- 353}, abstract = {Die Ergebnisse aus drei Traglastversuchen und einer umfangreichen numerischen Parameterstudie (FE-Berechnungen) zum Tragverhalten von Wellstegtr{\"a}gern mit quadratischen Steg{\"o}ffnungen werden vorgestellt. Es werden versteifte Steg{\"o}ffnungen mit einem umlaufenden Versteifungskranz betrachtet. In der Parameterstudie werden die Einfl{\"u}sse der Steg{\"o}ffnungsgeometrie, der Tr{\"a}gergeometrie und der Position der Steg{\"o}ffnung auf die Querkrafttragf{\"a}higkeit der Wellstegtr{\"a}ger untersucht.}, language = {de} } @misc{CaoWangTaoetal., author = {Cao, Xianli and Wang, Li and Tao, Hui and He, Weiwei and Liang, Xiaopeng and Liu, Bin and Oehring, Michael and Paul, Jonathan and Pyczak, Florian and Liu, Yong}, title = {Morphology evolution of P-Ti3AlC carbides and their influence on creep properties in a crept Ti-45Al-5Nb-0.75C alloy}, series = {Journal of Materials Research and Technology}, volume = {29}, journal = {Journal of Materials Research and Technology}, publisher = {Elsevier BV}, issn = {2238-7854}, doi = {10.1016/j.jmrt.2024.02.146}, pages = {4181 -- 4190}, language = {en} } @misc{BuchananLewisParisetal., author = {Buchanan, Erin M. and Lewis, Savannah C. and Paris, Bastien and Forscher, Patrick S. and Pavlacic, Jeffrey M. and Beshears, Julie E. and Drexler, Shira Meir and Gourdon-Kanhukamwe, Am{\´e}lie and Mallik, Peter R and Silan, Miguel Alejandro A. and Miller, Jeremy K. and IJzerman, Hans and Moshontz, Hannah and Beaudry, Jennifer L. and Suchow, Jordan W. and Chartier, Christopher R. and Coles, Nicholas A. and Sharifian, MohammadHasan and Todsen, Anna Louise and Levitan, Carmel A. and Azevedo, Fl{\´a}vio and Legate, Nicole and Heller, Blake and Rothman, Alexander J. and Dorison, Charles A. and Gill, Brian P. and Wang, Ke and Rees, Vaughan W. and Gibbs, Nancy and Goldenberg, Amit and Thi Nguyen, Thuy-vy and Gross, James J. and Kaminski, Gwena{\^e}l and von Bastian, Claudia C. and Paruzel-Czachura, Mariola and Mosannenzadeh, Farnaz and Azouaghe, Soufian and Bran, Alexandre and Ruiz-Fernandez, Susana and Santos, Anabela Caetano and Reggev, Niv and Zickfeld, Janis H. and Akkas, Handan and Pantazi, Myrto and Ropovik, Ivan and Korbmacher, Max and Arriaga, Patr{\´i}cia and Gjoneska, Biljana and Warmelink, Lara and Alves, Sara G. and de Holanda Coelho, Gabriel Lins and Stieger, Stefan and Schei, Vidar and Hanel, Paul H. P. and Szaszi, Barnabas and Fedotov, Maksim and Antfolk, Jan and Marcu, Gabriela-Mariana and Schr{\"o}tter, Jana and Kunst, Jonas R. and Geiger, Sandra J. and Adetula, Adeyemi and Kocalar, Halil Emre and Kielińska, Julita and Kačm{\´a}r, Pavol and Bokkour, Ahmed and Galindo-Caballero, Oscar J. and Djamai, Ikhlas and P{\"o}ntinen, Sara Johanna and AGESIN, Bamikole Emmanuel and Jerns{\"a}ther, Teodor and Urooj, Anum and Rachev, Nikolay R. and Koptjevskaja-Tamm, Maria and Kurfal{\i}, Murathan and Pit, Ilse L. and Li, Ranran and {\c{C}}oksan, Sami and Dubrov, Dmitrii and Paltrow, Tamar Elise and Ban{\´i}k, Gabriel and Korobova, Tatiana and Studzinska, Anna and Jiang, Xiaoming and Aruta, John Jamir Benzon R. and Vintr, J{\´a}chym and Chiu, Faith and Kaliska, Lada and Berkessel, Jana B. and T{\"u}mer, Murat and Morales-Izquierdo, Sara and Chuan-Peng, Hu and Vezirian, Kevin and Rosa, Anna Dalla and Bialobrzeska, Olga and Vasilev, Martin R. and Beitner, Julia and K{\´a}cha, Ondřej and Žuro, Barbara and Westerlund, Minja and Nedelcheva-Datsova, Mina and Findor, Andrej and Krupić, Dajana and Kowal, Marta and Askelund, Adrian Dahl and Pourafshari, Razieh and Đorđević, Jasna Milošević and Schmidt, Nadya-Daniela and Baklanova, Ekaterina and Szala, Anna and Zakharov, Ilya and Vranka, Marek A. and Ihaya, Keiko and Grano, Caterina and Cellini, Nicola and Białek, Michał and Anton-Boicuk, Lisa and Dalgar, Ilker and Ad{\i}g{\"u}zel, Arca and Verharen, Jeroen P. H. and Maturan, Princess Lovella G. and Kassianos, Angelos P. and Oliveira, Raquel and Čadek, Martin and Adoric, Vera Cubela and {\"O}zdoğru, Asil Ali and Sverdrup, Therese E. and Aczel, Balazs and Zambrano, Danilo and Ahmed, Afroja and Tamnes, Christian K. and Yamada, Yuki and Volz, Leonhard and Sunami, Naoyuki and Suter, Lilian and Vieira, Luc and Groyecka-Bernard, Agata and Kamburidis, Julia Arhondis and Reips, Ulf-Dietrich and Harutyunyan, Mikayel and Adetula, Gabriel Agboola and Allred, Tara Bulut and Barzykowski, Krystian and Antazo, Benedict G and Zsido, Andras N. and Šakan, Dušana Dušan and Cyrus-Lai, Wilson and Ahlgren, Lina Pernilla and Hruška, Matej and Vega, Diego and Manunta, Efisio and Mokady, Aviv and Capizzi, Mariagrazia and Martončik, Marcel and Say, Nicolas and Filip, Katarzyna and Vilar, Roosevelt and Staniaszek, Karolina and Vdovic, Milica and Adamkovic, Matus and Johannes, Niklas and Hajdu, Nandor and Cohen, Noga and Overkott, Clara and Krupić, Dino and Hubena, Barbora and Nilsonne, Gustav and Mioni, Giovanna and Solorzano, Claudio Singh and Ishii, Tatsunori and Chen, Zhang and Kushnir, Elizaveta and Karaarslan, Cemre and Ribeiro, Rafael R. and Khaoudi, Ahmed and Kossowska, Małgorzata and Bavolar, Jozef and Hoyer, Karlijn and Roczniewska, Marta and Karababa, Alper and Becker, Maja and Monteiro, Renan P. and Kunisato, Yoshihiko and Metin-Orta, Irem and Adamus, Sylwia and Kozma, Luca and Czarnek, Gabriela and Domurat, Artur and Štrukelj, Eva and Alvarez, Daniela Serrato and Parzuchowski, Michal and Massoni, S{\´e}bastien and Czamanski-Cohen, Johanna and Pronizius, Ekaterina and Muchembled, Fany and van Schie, Kevin and Sa{\c{c}}akl{\i}, Asl{\i} and Hristova, Evgeniya and Kuzminska, Anna O. and Charyate, Abdelilah and Bijlstra, Gijsbert and Afhami, Reza and Majeed, Nadyanna M. and Musser, Erica D. and Sirota, Miroslav and Ross, Robert M. and Yeung, Siu Kit and Papadatou-Pastou, Marietta and Foroni, Francesco and Almeida, In{\^e}s A. T. and Grigoryev, Dmitry and Lewis, David M. G. and Holford, Dawn L. and Janssen, Steve M. J. and Tatachari, Srinivasan and Batres, Carlota and Olofsson, Jonas K. and Daches, Shimrit and Belaus, Anabel and Pfuhl, Gerit and Corral-Frias, Nadia Sarai and Sousa, Daniela and R{\"o}er, Jan Philipp and Isager, Peder Mortvedt and Godbersen, Hendrik and Walczak, Radoslaw B. and Van Doren, Natalia and Ren, Dongning and Gill, Tripat and Voracek, Martin and DeBruine, Lisa M. and Anne, Michele and Očovaj, Sanja Batić and Thomas, Andrew G. and Arvanitis, Alexios and Ostermann, Thomas and Wolfe, Kelly and Arinze, Nwadiogo Chisom and Bundt, Carsten and Lamm, Claus and Calin-Jageman, Robert J and Davis, William E. and Karekla, Maria and Zorjan, Saša and Jaremka, Lisa M. and Uttley, Jim and Hricova, Monika and Koehn, Monica A and Kiselnikova, Natalia and Bai, Hui and Krafnick, Anthony J. and Balci, Busra Bahar and Ballantyne, Tonia and Lins, Samuel and Vally, Zahir and Esteban-Serna, Celia and Schmidt, Kathleen and Macapagal, Paulo Manuel L. and Szwed, Paulina and Zdybek, Przemysław Marcin and Moreau, David and Collins, W. Matthew and Joy-Gaba, Jennifer A. and Vilares, Iris and Tran, Ulrich S. and Boudesseul, Jordane and Albayrak-Aydemir, Nihan and Dixson, Barnaby James Wyld and Perillo, Jennifer T and Ferreira, Ana and Westgate, Erin C. and Aberson, Christopher L. and Arinze, Azuka Ikechukwu and Jaeger, Bastian and Butt, Muhammad Mussaffa and Silva, Jaime R. and Storage, Daniel Shafik and Janak, Allison P and Jim{\´e}nez-Leal, William and Soto, Jose A. and Sorokowska, Agnieszka and McCarthy, Randy and Tullett, Alexa M and Frias-Armenta, Martha and Ribeiro, Matheus Fernando Felix and Hartanto, Andree and Forbes, Paul A. G. and Willis, Megan L. and del Carmen Tejada R, Mar{\´i}a and Torres, Adriana Julieth Olaya and Stephen, Ian D and Vaidis, David C. and de la Rosa-G{\´o}mez, Anabel and Yu, Karen and Sutherland, Clare A. M. and Manavalan, Mathi and Behzadnia, Behzad and Urban, Jan and Baskin, Ernest and McFall, Joseph P. and Ogbonnaya, Chisom Esther and Fu, Cynthia H. Y. and Rahal, Rima-Maria and Ndukaihe, Izuchukwu L. G. and Hostler, Thomas J. and Kappes, Heather Barry and Sorokowski, Piotr and Khosla, Meetu and Lazarevic, Ljiljana B. and Eudave, Luis and Vilsmeier, Johannes K. and Luis, Elkin O. and Muda, Rafał and Agadullina, Elena and C{\´a}rcamo, Rodrigo A. and Reeck, Crystal and Anjum, Gulnaz and Venegas, M{\´o}nica Camila Toro and Misiak, Michal and Ryan, Richard M. and Nock, Nora L. and Travaglino, Giovanni A. and Mensink, Michael C. and Feldman, Gilad and Wichman, Aaron L. and Chou, Weilun and Ziano, Ignazio and Seehuus, Martin and Chopik, William J. and Kung, Franki Y. H. and Carpentier, Joelle and Vaughn, Leigh Ann and Du, Hongfei and Xiao, Qinyu and Lima, Tiago J. S. and Noone, Chris and Onie, Sandersan and Verbruggen, Frederick and Radtke, Theda and Primbs, Maximilian A.}, title = {The psychological science accelerator's COVID-19 rapid-response dataset}, series = {Scientific Data}, volume = {10}, journal = {Scientific Data}, number = {1}, publisher = {Springer Science and Business Media LLC}, issn = {2052-4463}, doi = {10.1038/s41597-022-01811-7}, pages = {1 -- 15}, language = {en} } @misc{LiGaoWangetal., author = {Li, Bai and Gao, Jiarong and Wang, Xiuru and Ma, Lan and Cui, Qiang and Veste, Maik}, title = {Effects of biological soil crusts on water infiltration and evaporation Yanchi Ningxia, Maowusu Desert, China}, series = {International Journal of Sediment Research}, volume = {31}, journal = {International Journal of Sediment Research}, number = {4}, issn = {1001-6279}, doi = {10.1016/j.ijsrc.2016.05.005}, pages = {311 -- 323}, abstract = {Biological soil crusts serve as a vanguard for improving the ecological environment in arid, semi-arid desertification areas.It is a good indicator of the level of improvement which the local ecological evironment is undertaking. In desert areas, water condition is a key factor of improving the ecological environment. As a first layer protection, biological crusts play an important role in local vegetation succession due to their abilities to conserve and maintain moisture. Using Maowusu desert in Yanchi of Ningxia province as an example, after three years of research, this paper chooses three kinds of biological crusts including lichen, moss and cyanobacterial which are under the cover of Artemisia ordosicaas research objects. The results of this study indicate that, the closer biological crusts are to Artemisia ordosica vegetation, the thicker they become. In the same position of Artemisia ordosica vegetation, the thickness of moss crusts is the highest, followed by lichen crusts, and the thickness of cyanobacterial crusts is the lowest. Biological soil crusts coverage protects the natural water content of soil layers from 0 to 5cm. Also, it effects falling water to infiltrate deeper, and cannot prevent the surfacewater content from evaporating effectively. The effect of biological crusts blocking water infiltration decreases with the increase of rainfall. At the same rainfall level, moss crusts provide the strongest water infiltration blockage, followed by lichen crusts and cyanobacterial crusts. With the increase of rainfall, the depth of water infiltration increases.At the same rainfall level, the relationship of water infiltration depth is as follows: cyanobacterial crusts > lichen crusts > moss crusts. With the increase of biological crusts thickness, they blocking water infiltration capacity is stronger, and the depth of water infiltration is smaller. Analysis on the characteristic of simulated rainfall process on biological crusts shows that sandy land can be fixed by applying appropriate artificial biological crusts to build a sustainable forest protection system and to create a stable ecosystem in desertification area.}, language = {en} } @misc{WangZhuCaoetal., author = {Wang, Guan and Zhu, Zihong and Cao, Jianhua and Zhu, Tongbin and Zhou, Jinxing and M{\"u}ller, Christoph and Li, Junran and Freese, Dirk and Le Roux, Xavier}, title = {Agricultural cultivation duration affects soil inorganic N turnover and supply capacity : Evidence in subtropical karst regions}, series = {Agriculture, Ecosystems \& Environment}, volume = {381}, journal = {Agriculture, Ecosystems \& Environment}, publisher = {Elsevier BV}, issn = {0167-8809}, doi = {10.1016/j.agee.2024.109462}, abstract = {The conversion of indigenous woodlands to agricultural lands has significantly altered nitrogen (N) cycling, impacting both ecosystem productivity and environmental health locally and globally. The relationship between cultivation duration and soil N availability and the mechanisms that drive these changes, however, remain unclear. In this study, we aimed to investigate how the duration of agricultural reclamation influences soil N cycling in the karst landscapes of southwestern China. We selected economic crops that have been cultivated for 1, 5, 15, and 30 years and conducted a regional survey using 15N labeling and molecular biology techniques to assess the effects of cultivation duration on soil N cycling. Our results show that short-term reclamation (< 5 years) caused minimal changes in soil N dynamics, with little effect on the net production rates of NH4+ and NO3-. However, as cultivation duration increased, we observed progressive declines in mineralization, nitrification, and microbial immobilization rates of NH4+ and NO3-. This led to a substantial reduction in soil inorganic N availability (-39 \% for NH4+ and -70 \% for NO3-) and a significant increase in the mean residence time of NH4+ and NO3-, indicating a slower N turnover. Long-term reclamation (30 years) resulted in the most pronounced effects, reducing the soil's capacity to supply inorganic N by impairing soil organic matter input, degrading soil structure, and lowering soil pH. Key soil variables such as soil organic carbon content, pH, total N, and soil aggregate stability explained over 80 \% of the variance in N turnover rates. Overall, our findings suggest that while shortterm reclamation has little impact, long-term agricultural practices significantly impair soil N cycling and availability. Sustainable agricultural practices that enhance soil organic matter content and promote soil aggregate stability could help preserve soil health and maintain productivity in karst and similar regions worldwide.}, language = {en} } @misc{LiuSongPyczaketal., author = {Liu, Xu and Song, Lin and Pyczak, Florian and Stark, Andreas and Wang, Li and Guo, Xiang and Zhang, Tiebang}, title = {Stress-induced orthorhombic O phase in TiAl alloys}, series = {Acta materialia}, volume = {286}, journal = {Acta materialia}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {1359-6454}, doi = {10.1016/j.actamat.2025.120751}, pages = {1 -- 13}, abstract = {The orthorhombic O phase precipitation within the D019-α2 phase has attracted increasing attention recently in high Nb containing TiAl (high Nb-TiAl) alloys since the precipitation temperature is close to the expected service temperature of the alloys. In this study, in-situ synchrotron high energy X-ray diffraction (HEXRD) reveals that the O phase precipitates at 550 °C while it dissolves into the α2 phase at 750 °C during heat treatments. However, under external stress the O phase unexpectedly precipitates from α2 phase at 800 °C and even 900 °C. The O phase formation proceeds further in the presence of a critical stress promoted by internal stress accumulation in the α2 phase, whereas the reverse O→α2 phase transformation takes place when the internal stresses are relaxed. Additionally, it has been revealed that the O phase preferentially precipitates from specifically oriented α2 grains with one of their <110> directions aligned perpendicular and their 〈0001〉 directions rotated by an angle of 120° out of the external load axis. This α2 phase orientation facilitates the α2→O crystal transition during uniaxial compression. Transmission electron microscopy (TEM) study shows that stress-induced α2→O transformation is governed by small atomic shifts in the α2 lattice. In addition, the selective growth of certain O variants via shuffling along an [110]α2 direction is found to accommodate the external strain component in this direction.}, language = {en} }