About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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High Entropy Alloys VIII
|
Presentation Title |
Dynamic Behavior of CrMnFeCoNi High-entropy Alloy |
Author(s) |
Marc A. Meyers, Zezhou Li, Shiteng Zhao, Carlos J Ruestes, Bingfeng Wang, Yong Liu, Peter Liaw, Wen Yang, Robert O Ritchie |
On-Site Speaker (Planned) |
Marc A. Meyers |
Abstract Scope |
High impact resistance of CrMnFeCoNi high-entropy alloy (HEA) is expected due to its excellent behavior under high-strain-rate compression. Its underlying deformation mechanisms under dynamic loading have been identified by both experiments and simulations. The high strain-hardening ability of the CrMnFeCoNi HEA, enabled by solid-solution hardening, forest dislocation hardening and twinning hardening, a marked strain-rate sensitivity and modest thermal softening, result in an excellent resistance to shear localization. For the CrMnFeCoNi alloy, a shear strain of ~7 has been discovered as required for the shear-band propagation (using a hat-shaped specimen that enables one single shear band to initiate and grow). Simultaneously, nanotwinning plays a dominant role on deformation during shock hardening (front surface) and spalling (rear surface) of the CrMnFeCoNi alloy employed on laser ablation shock compression. The remarkable high-strain-rate behavior of CrMnFeCoNi HEA and its deformation mechanisms make it a significant candidate for ballistic applications. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |