About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
A Dual-phase Alloy with Ultrahigh Strength-ductility Synergy Over a Wide Temperature Range |
Author(s) |
Jianzhong Jiang, Raymond K. Nutor, Qingping Cao, Xiaodong Wang, Dongxian Zhang |
On-Site Speaker (Planned) |
Jianzhong Jiang |
Abstract Scope |
In this talk, we report results for a precipitation-strengthening strategy, by tuning composition to design a CoNiV-based fcc/B2 duplex HEA. This alloy sustains ultrahigh gigapascal level tensile yield strengths and excellent ductility from cryogenic to elevated temperatures. The highest specific yield strength (~150.2 MPa·cm3/g) amongst reported ductile HEAs is obtained. The ability of the newly-developed alloy to sustain this excellent strength-ductility synergy over a wide temperature range is aided by multiple deformation mechanisms i.e., twins, stacking faults, dynamic strain aging, and dynamic recrystallization (DRX). Our results open the avenue for designing precipitation-strengthened light-weight HEAs with advanced strength-ductility combinations over a wide service temperature range. |
Proceedings Inclusion? |
Planned: |