About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Behavior at the Nanoscale VII
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Presentation Title |
Dynamic Behaviors of Multi-principal Element Alloys: Insights into Nanoscale |
Author(s) |
Wu-Rong Jian, Zhuocheng Xie, Xiaohu Yao, Shuozhi Xu, Yanqing Su, Irene Beyerlein |
On-Site Speaker (Planned) |
Wu-Rong Jian |
Abstract Scope |
Multi-principal element alloys (MPEAs) have been shown to exhibit an exceptional performance under dynamic loading, e.g., a combination of high strength and good ductility under high-strain-rate loading. Due to the difficulty in capturing the deformation phenomena at the nanoscale in high-rate experiments, the corresponding mechanisms are unclear. By means of a series of molecular dynamics simulations, we investigate the dynamic properties of a representative medium entropy alloy CoCrNi under high-speed shock loading and high-rate quasi-isentropic compression. The effects of two unique atomic-scale characteristics in MPEAs, i.e., lattice distortion (LD) and chemical short-range ordering (CSRO), on the spallation, amorphization and phase transition are considered. The triangular relation among atomistic characteristics in MPEAs, nano-scale dislocation/twinning behaviors and macro-scale dynamic behaviors are revealed in our study. This provides the nano-scale insights for the understanding of deformation mechanism of MPEAs and the design of the next-generation of advanced MPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Modeling and Simulation |