TY - GEN A1 - Liu, Xu A1 - Song, Lin A1 - Liu, Tong A1 - Stark, Andreas A1 - Pyczak, Florian A1 - He, Zhanbing A1 - Lin, Junpin A1 - Zhang, Tiebang T1 - In- and ex-situ study of the deformation behavior of the βo(ωo) phase in a Ti4Al3Nb alloy during high-temperature compression T2 - Journal of Alloys and Compounds N2 - In-situ synchrotron-based high energy X-ray diffraction (HEXRD) and ex-situ Gleeble tests were conducted to investigate the deformation behavior of the βo(ωo) phase in a Ti4Al3Nb alloy. In samples compressed at 600 and 800 °C, the brittle ωo phase deforms mostly elastically, resulting in the failure of the Ti4Al3Nb alloy by premature fracture. In a sample deformed at 900 °C, the ωo phase mostly transforms into the βo phase under uniaxial loading. Moreover, the ductility of a Ti4Al3Nb alloy is largely enhanced at this temperature. In a sample deformed at 1000 °C, dynamic recrystallization (DRX) of the βo phase extensively takes place. Direction 1 (D1) and Direction 2 (D2) deviating from the loading direction with an angle of 65° ± 5° and 15° ± 5° are selected to analyze the lattice strain evolution of (110)βo lattice planes. At the late stage of macro strain hardening, deformed[removed]βo//D1 oriented grains bear a higher load due to the occurrence of DRX in[removed]βo//D2 oriented grains. Subsequently, DRX continues in[removed]βo//D1 oriented βo grains. The coordinated deformation of βo grains ensures the good deformability of a Ti4Al3Nb alloy at 1000 °C. Y1 - 2022 U6 - https://doi.org/10.1016/j.jallcom.2022.165626 SN - 0925-8388 VL - 918 ER - TY - GEN A1 - Li, Longjun A1 - Wang, Li A1 - Liang, Zhida A1 - He, Junyang A1 - Qiu, Jingwen A1 - Pyczak, Florian A1 - Song, Min T1 - Effects of Ni and Cr on the high-temperature oxidation behavior and mechanisms of Co- and CoNi-base superalloys T2 - Materials and Design N2 - 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. Y1 - 2022 U6 - https://doi.org/10.1016/j.matdes.2022.111291 SN - 1873-4197 VL - 224 ER - TY - GEN A1 - Liang, Zhida A1 - Lilleodden, Erica A1 - Ovri, Henry A1 - Pyczak, Florian T1 - Surface Recrystallization in a Co-Based Superalloy During High Temperature Exposure T2 - Metallurgical and materials transactions. A, Physical metallurgy and materials science N2 - The effect of grinding on static recrystallization and oxidation of a novel Co-based superalloy has been studied. The evolution of surface recrystallization after heat treating at 850 °C in air was revealed by comparing ground specimens with electropolished ones. The loss of Al and Ti from the bulk material leads to the formation of a γ′-free region and further promotes recrystallization at the surface. Y1 - 2022 U6 - https://doi.org/10.1007/s11661-022-06852-6 SN - 1543-1940 VL - 53 IS - 12 SP - 4156 EP - 4160 ER - TY - GEN A1 - Shang, Yuanyuan A1 - Liu, Shaofei A1 - Liang, Zhida A1 - Pyczak, Florian A1 - Lei, Zhifeng A1 - Heidenreich, Tim A1 - Schöckel, Alexander A1 - Kai, Ji-jung A1 - Gizer, Gökhan A1 - Dornheim, Martin A1 - Klassen, Thomas T1 - Developing sustainable FeTi alloys for hydrogen storage by recycling T2 - Communications Materials N2 - Intermetallic alloys such as FeTi have attracted ever-growing attention as a safe and efficient hydrogen storage medium. However, the utilization of high-purity metals for the synthesis of such materials poses considerable concerns over the environmental sustainability of their large-scale production. Here, we report an approach for synthesizing FeTi from industrial scraps of iron (steels C45 and 316 L) and titanium (Ti alloy Grade 2) to reduce the carbon footprint associated with FeTi alloy synthesis, without compromising their hydrogen storage properties. At 50 °C and a pressure of 0 to 100 bar, the alloys obtained by using C45-Ti Grade 2 and 316L-Ti Grade 2 can absorb a maximum amount of hydrogen of 1.61 wt.% and 1.50 wt.%, respectively. Moreover, depending on the type of steel utilized, the thermodynamic properties can be modified. Our findings pave a pathway for developing high-performance, environmentally-sustainable FeTi alloys for hydrogen storage purposes using industrial metal wastes. Y1 - 2022 U6 - https://doi.org/10.1038/s43246-022-00324-5 SN - 2662-4443 VL - 3 IS - 1 ER - TY - GEN A1 - Amherd Hidalgo, Alexandra A1 - Ebel, Thomas A1 - Frykholm, Robert A1 - Carreño-Morelli, Efraín A1 - Pyczak, Florian T1 - High-oxygen MIM Ti-6Al-7Nb: Microstructure, tensile and fatigue properties T2 - Materials Today Communication Y1 - 2023 U6 - https://doi.org/10.1016/j.mtcomm.2022.104982 SN - 2352-4928 VL - Vol. 34 ER - TY - GEN A1 - Gabrisch, Heike A1 - Janovská, Michaela A1 - Rackel, Marcus W. A1 - Pyczak, Florian A1 - Stark, Andreas T1 - Impact of microstructure on elastic properties in the alloy Ti-42Al-8.5 Nb T2 - Journal of Alloys and Compounds Y1 - 2023 U6 - https://doi.org/10.1016/j.jallcom.2022.167578 SN - 1873-4669 SN - 0925-8388 VL - Vol. 932 ER - TY - GEN A1 - Wang, Li A1 - Liang, Xiaopeng A1 - Liu, Bin A1 - Oehring, Michael A1 - Paul, Jonathan David Heaton A1 - Liu, Jie A1 - Song, Min A1 - Pyczak, Florian A1 - Liu, Yong T1 - Stacking fault formation in perovskite Ti3AlC carbides in a TiAl based alloy during creep at 800°C T2 - Scripta Materialia Y1 - 2023 U6 - https://doi.org/10.1016/j.scriptamat.2022.115034 SN - 1872-8456 SN - 1359-6462 VL - Vol. 222 ER - TY - GEN A1 - Liu, Xu A1 - Stark, Andreas A1 - Pyczak, Florian A1 - Zhang, Tiebang T1 - In-situ synchrotron high energy X-ray diffraction study on the internal strain evolution of D019-α2 phase during high-temperature compression and subsequent annealing in a TiAl alloy T2 - Journal of Materials Science and Technology Y1 - 2023 U6 - https://doi.org/10.1016/j.jmst.2023.04.027 SN - 1941-1162 SN - 1005-0302 VL - Vol. 163 SP - 212 EP - 222 ER - TY - GEN A1 - Song, Lin A1 - Appel, Fritz A1 - Liu, Wenhao A1 - Pyczak, Florian A1 - Zhang, Tiebang T1 - {11¯01} tension twins and {11¯01}-{22¯01}/{22¯01}-{11¯01} double twins in the D019 ordered hexagonal α2-Ti3Al phase T2 - Acta Materialia Y1 - 2023 U6 - https://doi.org/10.1016/j.actamat.2023.119335 VL - 260 IS - 3 ER - TY - GEN A1 - Fröbel, Ulrich A1 - Stark, Andreas A1 - Paul, Jonathan A1 - Pyczak, Florian T1 - Assessment of the capability of Zr, Y, La, Gd, Dy, C, and Si to enhance the creep strength of gamma titanium aluminide alloys based on their effect on flow stress and thermal activation parameters T2 - Intermetallics Y1 - 2023 U6 - https://doi.org/10.1016/j.intermet.2023.108018 SN - 1879-0216 SN - 0966-9795 VL - Vol. 162 ER - TY - GEN A1 - Gussone, Joachim A1 - Rackel, Marcus W. A1 - Tumminello, Silvana A1 - Barriobero-Vila, Pere A1 - Kreps, Frederic A1 - Kelm, Klemens A1 - Stark, Andreas A1 - Schell, Norbert A1 - Pyczak, Florian A1 - Haubrich, Jan A1 - Requena, Guillermo T1 - Microstructure formation during laser powder bed fusion of Ti-22Al-25Nb with low and high pre-heating temperatures T2 - Materials and Design Y1 - 2023 U6 - https://doi.org/10.1016/j.matdes.2023.112154 SN - 0264-1275 VL - Vol. 232 ER - TY - GEN A1 - Lauhoff, Christian A1 - Arold, Tizian A1 - Bolender, Artjom A1 - Rackel, Marcus W. A1 - Pyczak, Florian A1 - Weinmann, Markus A1 - Xu, Wenzheng A1 - Molotnikov, Andrey A1 - Niendorf, Thomas T1 - Microstructure of an additively manufactured Ti-Ta-Al alloy using novel pre-alloyed powder feedstock material T2 - Additive Manufacturing Letters Y1 - 2023 U6 - https://doi.org/10.1016/j.addlet.2023.100144 SN - 2772-3690 VL - Vol. 6 ER - TY - GEN A1 - Guo, Xiang A1 - Song, Lin A1 - Liu, Xu A1 - Stark, Andreas A1 - Pyczak, Florian A1 - Zhang, Tiebang T1 - In-situ synchrotron HEXRD study on the phase transformation mechanisms of the ω-related phases in a Ti4Al3Nb alloy T2 - Materials Characterization Y1 - 2023 U6 - https://doi.org/10.1016/j.matchar.2023.112901 SN - 1873-4189 SN - 1044-5803 VL - Vol. 200 ER - TY - GEN A1 - Pyczak, Florian A1 - Liang, Zhida A1 - Neumeier, Steffen A1 - Rao, Ziyuan T1 - Stability and Physical Properties of the L12-γ′ Phase in the CoNiAlTi-System T2 - Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Y1 - 2023 U6 - https://doi.org/10.1007/s11661-022-06949-y SN - 1073-5623 VL - 54 IS - 5 SP - 1661 EP - 1670 ER - TY - GEN A1 - Volpato, G. M. A1 - Pereira, A. S. P. A1 - Lemos, G. A1 - Schmitt, M. A1 - Pyczak, Florian A1 - Tetzlaff, Ulrich A1 - Fredel, Márcio C. T1 - Out-of-Equilibrium Formation of Ni3Ti η-Phase in Inconel X-750 Produced via Laser Powder Bed Fusion and Spark Plasma Sintering T2 - Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Y1 - 2023 U6 - https://doi.org/10.1007/s11661-022-06946-1 SN - 1073-5623 VL - 54 IS - 5 SP - 1924 EP - 1936 ER - TY - GEN A1 - Zhang, Haoyin A1 - Wang, C. P. A1 - Pyczak, Florian A1 - Ebel, Thomas A1 - Liu, X. J. T1 - A New Kind of Biomedical Ti–Mn–Nb Alloy T2 - Physica Status Solidi. A, Applications and Materials Science Y1 - 2023 U6 - https://doi.org/10.1002/pssa.202200348 SN - 1862-6300 VL - 220 IS - 7 ER - TY - GEN A1 - Liu, Xu A1 - Song, Lin A1 - Stark, Andreas A1 - Pyczak, Florian A1 - Zhang, Tiebang T1 - In-situ synchrotron high energy X-ray diffraction study on the deformation mechanisms of D019-α2 phase during high-temperature compression in a TiAl alloy T2 - Journal of Materials Research and Technology Y1 - 2024 U6 - https://doi.org/10.1016/j.jmrt.2024.10.231 SN - 2238-7854 VL - 33 SP - 5850 EP - 5862 PB - Elsevier BV ER - TY - GEN A1 - Cao, Xianli A1 - Wang, Li A1 - Tao, Hui A1 - He, Weiwei A1 - Liang, Xiaopeng A1 - Liu, Bin A1 - Oehring, Michael A1 - Paul, Jonathan A1 - Pyczak, Florian A1 - Liu, Yong T1 - Morphology evolution of P-Ti3AlC carbides and their influence on creep properties in a crept Ti-45Al-5Nb-0.75C alloy T2 - Journal of Materials Research and Technology Y1 - 2024 U6 - https://doi.org/10.1016/j.jmrt.2024.02.146 SN - 2238-7854 VL - 29 SP - 4181 EP - 4190 PB - Elsevier BV ER - TY - GEN A1 - Wang, Li A1 - Wang, Yihao A1 - Pyczak, Florian A1 - Oehring, Michael A1 - Song, Min A1 - Liu, Yong T1 - Revealing complex planar defects and their interactions at atomic resolution in a Laves phase containing Co-base superalloy T2 - Acta Materialia Y1 - 2024 U6 - https://doi.org/10.1016/j.actamat.2023.119568 SN - 1359-6454 VL - 264 SP - 1 EP - 20 PB - Elsevier BV ER - TY - GEN A1 - Tang, Yingchun A1 - Li, Changle A1 - Lu, Song A1 - Li, Wei A1 - Vitos, Levente A1 - Pyczak, Florian T1 - Magneto-chemical effects in the elastic properties of Co3Al-based compounds T2 - Materials Today Communications Y1 - 2024 U6 - https://doi.org/10.1016/j.mtcomm.2024.110507 SN - 2352-4928 VL - 41 SP - 1 EP - 11 PB - Elsevier BV ER -