About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys II
|
Presentation Title |
High Strain Rate Deformation Behavior of Multi-Principal Element Alloys |
Author(s) |
Shristy Jha, Saideep Muskeri, Phillip Jannotti, Jeffrey Lloyd, Rajiv Mishra, Sundeep Mukherjee |
On-Site Speaker (Planned) |
Sundeep Mukherjee |
Abstract Scope |
The mechanical response of several model MPEAs was evaluated at quasistatic, dynamic, and ballistic strain rates. The microstructure after quasistatic deformation was dominated by highly deformed grains. High density of deformation bands was observed at dynamic strain rates but there was no indication of cracks or twinning. Ballistic response was evaluated for several single- and multi-phase MPEAs. The deformed microstructure after ballistic impact was dominated by adiabatic shear bands, microbands, and dynamic recrystallization. Rigorous characterization in the form of mechanical testing, scanning electron microscopy, and spatially resolved nano-indentation for ballistically impacted plates was used to connect microstructural details to aspects of ballistic behavior governing performance. Based on the results, it was shown that although the addition of a harder secondary phase improves strength, cracks that initiate and propagate within the harder phase and ultimately across the target plate drastically reduce the ballistic performance of the two-phase MPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |