|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Correlating the Microstructure and Mechanical Properties of Additively Manufactured Al-Ce Alloys Using In-situ Micromechanical Testing
||Tanvi Ajantiwalay, Richard Michie, Amit Shyam, Alex Plotkowski, Arun Devaraj
|On-Site Speaker (Planned)
Al-Ce based alloys are current candidates for high-temperature applications due to their excellent thermal stability and good castability. One of the techniques useful in processing these alloys is the laser powder bed fusion (LPBF) based additive manufacturing (AM) which, is shown to be beneficial to modify its eutectic microstructure. Some heterogeneity however, with the formation of melt pool boundaries (MPBs) is observed in the microstructure which are known to be the weak sites during bulk-scale mechanical testing. Thus, to improve an understanding of the local mechanical properties within MPBs and to further optimize the LPBF process we performed in-situ nanoindentation and micro-pillar compression using the PI89 Picoindenter at room and high temperatures. The results obtained from this study in the form of load vs. displacement curves are then used to calculate material properties such as hardness, yield stress and elastic modulus.
||Mechanical Properties, Characterization, Additive Manufacturing