| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
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| Presentation Title |
Atomistic Simulation of Dislocation-Obstacle Interactions in Al0.3CoCrFeNi Multi-Principal Element Alloys |
| Author(s) |
Anshu Raj, Subah Mubassira, Peter K. Liaw, Shuozhi Xu |
| On-Site Speaker (Planned) |
Anshu Raj |
| Abstract Scope |
Multi-Principal Element Alloys (MPEAs) are a novel type of material made from three or more main elements mixed in nearly equal amounts. This unique composition creates high configurational entropy, which stabilizes the solid solution phase and imparts exceptional mechanical properties, including remarkable strength, ductility, and toughness. In this study, we take Al0.3CoCrFeNi MPEA as an example. First, we examined the stacking fault energy surfaces. Next, the edge and screw dislocations were also analyzed in terms of the local slip resistance and critical resolved shear strength (CRSS) in an obstacle-free lattice. Moreover, the interactions between dislocations and voids, as well as dislocations and precipitates, were found to significantly enhance the mechanical strength of the Al0.3CoCrFeNi MPEA. The size of the void plays a very important role in decreasing the CRSS value; the L12 and B2 precipitates require higher CRSS for the dislocation bypass than the randomly distributed precipitates. |
| Proceedings Inclusion? |
Planned: |