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 |
Effect of Microstructure on Hot Deformation and Dynamic Recrystallization Behavior of WMoFeNi MPEA Alloy Regulating Alloy Composition |
Author(s) |
Riya Barua, Thomas John Balk |
On-Site Speaker (Planned) |
Riya Barua |
Abstract Scope |
The equiatomic alloy WMoFeNi, consisting of three phases (BCC, FCC and μ) has previously drawn attention due to apparent adiabatic shear banding during high strain rate tests. It was postulated that shear band formation occurs in conjunction with dynamic recrystallization (DRX). In our study, two nonequiatomic WMoFeNi alloys were prepared: W10Mo33Fe33Ni24, which consists of three phases (BCC, FCC, μ); and W5Mo15Fe40Ni40, which consists of two phases (FCC, μ). Their mechanical properties were evaluated using micro-specimen tensile testing. Hot deformation tests were performed to study the influence of these phase fractions on DRX behavior. Elevated-temperature testing was done in a Gleeble thermomechanical simulator at temperatures between 800 – 1200oC and strain rates between 0.001 – 1 s-1. Parameters such as critical stress and strain for initiating DRX were determined by analyzing strain hardening rate vs stress behavior, and constitutive equations were developed to understand flow stress behavior in these alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, High-Temperature Materials, High-Entropy Alloys |