@misc{BaehrBuhlRadowetal., author = {B{\"a}hr, Martin and Buhl, Johannes and Radow, Georg and Schmidt, Johannes and Bambach, Markus and Breuß, Michael and F{\"u}genschuh, Armin}, title = {Stable honeycomb structures and temperature based trajectory optimization for wire-arc additive manufacturing}, series = {Optimization and Engineering}, volume = {22}, journal = {Optimization and Engineering}, number = {2}, issn = {1573-2924}, doi = {10.1007/s11081-020-09552-5}, pages = {913 -- 974}, abstract = {We consider two mathematical problems that are connected and occur in the layer-wise production process of a workpiece using wire-arc additive manufacturing. As the first task, we consider the automatic construction of a honeycomb structure, given the boundary of a shape of interest. In doing this, we employ Lloyd's algorithm in two different realizations. For computing the incorporated Voronoi tesselation we consider the use of a Delaunay triangulation or alternatively, the eikonal equation. We compare and modify these approaches with the aim of combining their respective advantages. Then in the second task, to find an optimal tool path guaranteeing minimal production time and high quality of the workpiece, a mixed-integer linear programming problem is derived. The model takes thermal conduction and radiation during the process into account and aims to minimize temperature gradients inside the material. Its solvability for standard mixed-integer solvers is demonstrated on several test-instances. The results are compared with manufactured workpieces.}, language = {en} } @misc{LenzBrykarczykPfeiferetal., author = {Lenz, Wolfgang and Brykarczyk, Daniel and Pfeifer, Herbert and Neumann, Andreas and Bambach, Markus}, title = {Theoretical limits of the increase of radiative heat transfer by increased surface areas of radiant tubes}, series = {Applied Thermal Engineering}, volume = {Vol. 184}, journal = {Applied Thermal Engineering}, issn = {1359-4311}, doi = {10.1016/j.applthermaleng.2020.116246}, pages = {7}, language = {en} } @misc{StendalEisentrautSizovaetal., author = {Stendal, Johan Andreas and Eisentraut, Mark and Sizova, Irina and Bolz, Sebastian and Weiß, Sabine and Bambach, Markus}, title = {Accelerated hot deformation and heat treatment of the TiAl alloy TNM-B1 for enhanced hot workability and controlled damage}, series = {Journal of Materials Processing Technology}, volume = {Vol. 291}, journal = {Journal of Materials Processing Technology}, issn = {0924-0136}, doi = {10.1016/j.jmatprotec.2020.116999}, pages = {12}, language = {en} } @misc{HemesMeinersSizovaetal., author = {Hemes, Susanne and Meiners, Frank and Sizova, Irina and Hama-Saleh, Rebar and R{\"o}hrens, Daniel and Weisheit, Andreas and H{\"a}fner, Constantin Leon and Bambach, Markus}, title = {Microstructures and Mechanical Properties of Hybrid, Additively Manufactured Ti6Al4V after Thermomechanical Processing}, series = {Materials}, volume = {14}, journal = {Materials}, number = {4}, issn = {1996-1944}, doi = {10.3390/ma14041039}, language = {en} } @misc{BlumbergLiBesongetal., author = {Blumberg, Julian and Li, Zhoulong and Besong, Lemopi Isidore and Polte, Mitchel and Buhl, Johannes and Uhlmann, Eckart and Bambach, Markus}, title = {Deformation error compensation of industrial robots in single point incremental forming by means of data-driven stiffness model}, series = {26th International Conference on Automation and Computing (ICAC), 2-4 Sept. 2021, Portsmouth, United Kingdom}, journal = {26th International Conference on Automation and Computing (ICAC), 2-4 Sept. 2021, Portsmouth, United Kingdom}, isbn = {978-1-86043-557-7}, doi = {10.23919/ICAC50006.2021.9594138}, pages = {6}, language = {en} } @misc{BambachSizovaSzyndleretal., author = {Bambach, Markus and Sizova, Irina and Szyndler, Joanna and Bennett, Jennifer and Hyatt, Greg and Cao, Jian and Papke, Thomas and Merklein, Marion}, title = {On the hot deformation behavior of Ti-6Al-4V made by additive manufacturing}, series = {Journal of Materials Processing Technology}, volume = {288}, journal = {Journal of Materials Processing Technology}, issn = {0924-0136}, doi = {10.1016/j.jmatprotec.2020.116840}, language = {en} } @misc{SizovaSviridovBambachetal., author = {Sizova, Irina and Sviridov, Alexander and Bambach, Markus and Eisentraut, Mark and Hemes, Susanne and Hecht, Ulrike and Marquardt, Axel and Leyens, Christoph}, title = {A study on hot-working as alternative post-processing method for titanium aluminides built by laser powder bed fusion and electron beam melting}, series = {Journal of Materials Processing Technology}, volume = {291}, journal = {Journal of Materials Processing Technology}, issn = {0924-0136}, doi = {10.1016/j.jmatprotec.2020.117024}, pages = {14}, language = {en} } @misc{BambachImranSizovaetal., author = {Bambach, Markus and Imran, Muhammad and Sizova, Irina and Buhl, Johannes and Gerster, Stephan and Herty, Michael}, title = {A soft sensor for property control in multi-stage hot forming based on a level set formulation of grain size evolution and machine learning}, series = {Advances in Industrial and Manufacturing Engineering}, journal = {Advances in Industrial and Manufacturing Engineering}, number = {2}, issn = {2666-9129}, doi = {10.1016/j.aime.2021.100041}, pages = {13}, language = {en} } @misc{HemesKochHamaSalehetal., author = {Hemes, Susanne and Koch, Waldemar and Hama-Saleh, Rebar and Sizova, Irina and Meiners, Frank and Mathes, Michael and Bambach, Markus and Weisheit, Andreas and Schleifenbaum, Johannes Henrich}, title = {Microstructural and Mechanical Analysis of High-Performance Parts Produced by Hybrid Additive Manufacturing of Powder LMD on Forged Base Components}, series = {Advanced Materials Research}, volume = {Vol. 1161}, journal = {Advanced Materials Research}, issn = {1662-8985}, doi = {10.4028/www.scientific.net/AMR.1161.85}, pages = {85 -- 93}, language = {en} } @misc{BambachSizovaKiesetal., author = {Bambach, Markus and Sizova, Irina and Kies, Fabian and Haase, Christian}, title = {Directed energy deposition of Inconel 718 powder, cold and hot wire using a six-beam direct diode laser set-up}, series = {Additive Manufacturing}, volume = {Vol. 47}, journal = {Additive Manufacturing}, issn = {2214-8604}, doi = {10.1016/j.addma.2021.102269}, pages = {12}, language = {en} } @incollection{SviridovSizovaBambach, author = {Sviridov, Alexander and Sizova, Irina and Bambach, Markus}, title = {Fast Development of New Alloys for Metal Forming Using Additive Manufacturing}, series = {Forming the Future : Proceedings of the 13th International Conference on the Technology of Plasticity}, booktitle = {Forming the Future : Proceedings of the 13th International Conference on the Technology of Plasticity}, editor = {Daehn, Glenn}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-75380-1}, issn = {2367-1181}, doi = {10.1007/978-3-030-75381-8_158}, pages = {1893 -- 1902}, language = {en} } @misc{IsrarBuhlBambach, author = {Israr, Rameez and Buhl, Johannes and Bambach, Markus}, title = {A study on power-controlled wire-arc additive manufacturing using a data-driven surrogate model}, series = {The International Journal of Advanced Manufacturing Technology}, volume = {177}, journal = {The International Journal of Advanced Manufacturing Technology}, number = {7-8}, issn = {1433-3015}, doi = {10.1007/s00170-021-07358-y}, pages = {2133 -- 2147}, abstract = {Wire-arc additive manufacturing (WAAM) provides an alternative for the production of various metal products needed in medium to large batch sizes due to its high deposition rates. However, the cyclic heat input in WAAM may cause local overheating. To avoid adverse effects on the performance of the part, interlayer dwelling and active cooling are used, but these measures increase the process time. Alternatively, the temperature during the WAAM process could be controlled by optimizing the welding power. The present work aims at introducing and implementing a novel temperature management approach by adjusting the weld-bead cross-section along with the welding power to reduce the heat accumulation in the WAAM process. The temperature evolution during welding of weld beads of different cross-sections is investigated and a database of the relation between optimal welding power for beads of various sizes and different pre-heating temperatures was established. The numerical results are validated experimentally with a block-shaped geometry. The results show that by the proposed method, the test shape made was welded with lower energy consumption and process time as compared to conventional constant-power WAAM. The proposed approach efficiently manages the thermal input and reduces the need for pausing the process. Hence, the defects related to heat accumulation might be reduced, and the process efficiency increased.}, language = {en} } @misc{NguyenBuhlIsraretal., author = {Nguyen, Lam and Buhl, Johannes and Israr, Rameez and Bambach, Markus}, title = {Analysis and compensation of shrinkage and distortion in wire-arc additive manufacturing of thin-walled curved hollow sections}, series = {Additive Manufacturing}, volume = {Vol. 47}, journal = {Additive Manufacturing}, issn = {2214-8604}, doi = {10.1016/j.addma.2021.102365}, language = {en} } @misc{BuhlKloeppelMertenetal., author = {Buhl, Johannes and Kl{\"o}ppel, Thomas and Merten, Mathias and Haufe, Andre and Israr, Rameez and Bambach, Markus}, title = {Numerical prediction of process-dependent properties of high-performance Ti6Al4 in LS-DYNA}, series = {ESAFORM 2021 : 24th International Conference on Material Forming}, journal = {ESAFORM 2021 : 24th International Conference on Material Forming}, doi = {doi: 10.25518/esaform21.1496}, language = {en} } @misc{SzczepańskiBambachJenschetal., author = {Szczepański, Łukasz and Bambach, Markus and Jensch, Felix and Ambroziak, Andrzej and Kurzynowski, Tomasz}, title = {Structural investigations of Fe-Zr-Si-Cu metallic glass with low glass-forming ability produced in laser powder bed fusion technology}, series = {Materials \& Design}, volume = {Vol. 210}, journal = {Materials \& Design}, issn = {0264-1275}, doi = {https://doi.org/10.1016/j.matdes.2021.110112}, pages = {7}, language = {en} } @misc{DeillonJenschPalmetal., author = {Deillon, L{\´e}a and Jensch, Felix and Palm, Frank and Bambach, Markus}, title = {A new high strength Al-Mg-Sc alloy for laser powder bed fusion with calcium addition to effectively prevent magnesium evaporation}, series = {Journal of materials processing technology}, volume = {Vol. 300}, journal = {Journal of materials processing technology}, issn = {1873-4774}, doi = {10.1016/j.jmatprotec.2021.117416}, pages = {10}, language = {en} } @misc{PetrikSydowBambach, author = {Petrik, Jan and Sydow, Benjamin and Bambach, Markus}, title = {Beyond parabolic weld bead models: AI-based 3D reconstruction of weld beads under transient conditions in wire-arc additive manufacturing}, series = {Journal of Materials Processing Technology}, volume = {302 (2022)}, journal = {Journal of Materials Processing Technology}, doi = {10.1016/j.jmatprotec.2021.117457}, pages = {16}, language = {en} } @misc{MaqboolMaassBuhletal., author = {Maqbool, Fawad and Maaß, Fabian and Buhl, Johannes and Hahn, Marlon and Hajavifard, Ramin and Walther, Frank and Tekkaya, A. Erman and Bambach, Markus}, title = {Targeted residual stress generation in single and two point incremental sheet forming (ISF)}, series = {Archive of Applied Mechanics}, volume = {91}, journal = {Archive of Applied Mechanics}, number = {8}, issn = {1432-0681}, doi = {10.1007/s00419-021-01935-z}, pages = {3465 -- 3487}, language = {en} } @misc{AfzalHajavifardBuhletal., author = {Afzal, Muhammad Junaid and Hajavifard, Ramin and Buhl, Johannes and Walther, Frank and Bambach, Markus}, title = {Influence of process parameters on the residual stress state and properties in disc springs made by incremental sheet forming (ISF)}, series = {Forschung im Ingenieurwesen}, volume = {85}, journal = {Forschung im Ingenieurwesen}, number = {3}, issn = {1434-0860}, doi = {10.1007/s10010-021-00491-w}, pages = {783 -- 793}, language = {en} } @misc{BambachHertyImran, author = {Bambach, Markus and Herty, Michael and Imran, Muhammad}, title = {Feedback stabilization of forming processes}, series = {arXiv}, journal = {arXiv}, language = {en} }