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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys V: Mechanical Behavior
Presentation Title EBSD analysis of microstructure evolution in hot-deformed WMoFeNi MPEA Alloy system
Author(s) Riya Barua, Thomas John Balk
On-Site Speaker (Planned) Riya Barua
Abstract Scope The WMoFeNi alloy system offers a promising alternative to tungsten heavy alloys due to its self-sharpening properties. The microstructural evolution of W5Mo15Fe40Ni40 subjected to hot deformation was investigated and compared with the as-cast state. Hot deformation was previously conducted between 900°C – 1100 °C strain rates of 0.01s⁻¹- 10 s⁻¹. The initial microstructure of the as-cast alloy consisted of interdendritic μ-phase lamellae embedded within an FCC matrix. EBSD of the as-cast alloy revealed a grain boundary pinning effect exerted by the μ phase. As strain rate decreases and deformation temperature increases, there is sufficient time for grains to undergo dynamic recrystallization (DRX). EBSD was employed to identify the onset of DRX and elucidate the grain growth mechanisms. At temperatures exceeding 1100 °C, plate-like μ phases were observed to nucleate from the supersaturated FCC matrix. This study also aims to determine whether the μ phase serves as a potential nucleation site for DRX.
Proceedings Inclusion? Planned:

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