About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Amorphization Mechanism under Shock Loading in the Medium Entropy Alloy CoCrNi |
Author(s) |
Wu-Rong Jian, Shuozhi Xu, Irene J. Beyerlein |
On-Site Speaker (Planned) |
Wu-Rong Jian |
Abstract Scope |
The medium entropy alloy CoCrNi has been shown to exhibit an exceptional performance under quasi-static loading, e.g., a combination of high strength and good ductility. By using molecular dynamics simulations, we further investigate its dynamic properties under high-speed shock loading in a configuration with completely random atomic distribution. For comparison, we repeat shock loading along two crystallographic orientations, i.e., <111> and <110>. Compared to the <110> direction, the <111> direction behaves more shock-resistant and generates smaller amounts of dislocations and twinning at the same shock velocity. For both loading directions, we find that the deformation mode changes from dislocation slip and twinning to amorphization with the increase in the shock velocity. When amorphization occurs, the effect of shock loading direction on shock-induced structural evolution disappears, since the sample behind the shock wave front enters the hydrostatic compressive state quickly |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, High-Entropy Alloys, Mechanical Properties |