About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Enhanced Strain Hardening During Plastic Deformation of FCC Multi-Principal Element Alloys with L12 Nanodomains |
Author(s) |
Wenle Xu, Daniel Salas, Bibhu Sahu, Ibrahim Karaman, Raymundo Arroyave, Mrinalini Mulukutla, Trevor Hastings |
On-Site Speaker (Planned) |
Wenle Xu |
Abstract Scope |
This study explores the deformation mechanisms and mechanical properties of several non-equiatomic CoCrFeNiV multi-principal element alloys, selected from 80 alloys, computationally designed using multi-objective optimization. These alloys exhibit outstanding ultimate tensile strength levels as high as 1.6 GPa and a high strain-hardening rate. High-resolution transmission electron microscopy revealed uniformly distributed L12 ordered nanodomains within the FCC matrix, which is attributed to the short-range ordering of vanadium atoms. During tensile deformation, these nanodomains lead to the planar slip, deformation twinning, and high-density stacking faults and nano-twins, which significantly contribute to the alloy's strength and work hardening capabilities. Such nano-twins did not form during the deformation of fully solution-annealed samples. In addition, the effects of chemical species on the UTS and work hardening rate are revealed. The insights on the influence of L12 nanodomains on mechanical properties offer valuable guidance for the design and application of HEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |