TY - JOUR
T1 - Advancements in metal additive manufacturing
T2 - In-situ heat treatment of aluminium alloys during the laser powder bed fusion process
AU - Schimbäck, David
AU - Kaserer, Lukas
AU - Mair, Philipp
AU - Mohebbi, M.S.
AU - Staron, Peter
AU - Maier-Kiener, Verena
AU - Letofsky-Papst, Ilse
AU - Kremmer, Thomas
AU - Palm, Frank
AU - Montes, I.
AU - Höppel, Heinz Werner
AU - Leichtfried, Gerhard J.
AU - Pogatscher, Stefan
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/7
Y1 - 2024/7
N2 - The high design freedom of laser powder bed fusion (LPBF) additive manufacturing enables new integrated structures, which in turn demand advances in the process conditions and material design to exploit the full potential of this process. A computational multi-scale thermal simulation and metallurgical analysis of the aluminium alloy Scalmalloy® were used to develop and present a specific process window to enable an in-situ heat treatment during LPBF. High resolution analysis and synchrotron experiments on specimens manufactured in this process window revealed a major proportion of nano-sized Al
3(Sc
xZr
1−x) solute-clusters were already present in the as-built state, as predicted by simulation. Supported by this experimental research, the new processing concept of in-situ heat treatment yielded the highest recorded strength values combined with high ductility directly after LPBF for Scalmalloy®. This advancement in LPBF enables highly complex, thin-walled structures directly made from a high-strength, lightweight material, which is not possible with conventional processes that require a subsequent heat treatment cycle.
AB - The high design freedom of laser powder bed fusion (LPBF) additive manufacturing enables new integrated structures, which in turn demand advances in the process conditions and material design to exploit the full potential of this process. A computational multi-scale thermal simulation and metallurgical analysis of the aluminium alloy Scalmalloy® were used to develop and present a specific process window to enable an in-situ heat treatment during LPBF. High resolution analysis and synchrotron experiments on specimens manufactured in this process window revealed a major proportion of nano-sized Al
3(Sc
xZr
1−x) solute-clusters were already present in the as-built state, as predicted by simulation. Supported by this experimental research, the new processing concept of in-situ heat treatment yielded the highest recorded strength values combined with high ductility directly after LPBF for Scalmalloy®. This advancement in LPBF enables highly complex, thin-walled structures directly made from a high-strength, lightweight material, which is not possible with conventional processes that require a subsequent heat treatment cycle.
UR - http://www.scopus.com/inward/record.url?scp=85194421353&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2024.146102
DO - 10.1016/j.msea.2024.146102
M3 - Article
SN - 0921-5093
VL - 905.2024
JO - Materials science and engineering: A, Structural materials: properties, microstructure and processing
JF - Materials science and engineering: A, Structural materials: properties, microstructure and processing
IS - July
M1 - 146102
ER -