About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Bridging Scales: Deformation and Damage Mechanisms in Microstructurally and Compositionally Complex Metallic Alloys
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| Presentation Title |
Mechanisms of Transformation and Recovery in TRIP-metastable High-Entropy Alloys revealed by in-situ heating and straining |
| Author(s) |
Priyanka Agrawal, Roopam Jain, Chloe Jabel, Eric Kusterer, Rajiv S. Mishra |
| On-Site Speaker (Planned) |
Priyanka Agrawal |
| Abstract Scope |
Dual-phase transformation-induced plasticity (TRIP) high-entropy alloys (HEAs) have been extensively studied to improve the strength–ductility synergy. This enhancement arises from hierarchical deformation mechanisms, which are influenced by alloy chemistry through its effect on stacking fault energy (SFE) and by processing conditions that determine phase fractions. To better understand these mechanisms and explore their temperature dependence, in situ experiments were performed in a scanning electron microscope using a Kammrath-Weiss setup. Two HEA compositions were examined, both exhibiting TRIP via the γ-fcc → ε-hcp transformation: ε-hcp dominated: Fe40Mn20Cr15Co20Si5 and γ-fcc dominated: Fe38.5Mn20Cr15Co20Si5Cu1.5 (all compositions in wt%). This work aims to investigate the dependence of SFE and work hardening on temperature and strain, focusing on the forward transformation and recovery rates. This study demonstrates the usefulness of in-situ SEM techniques in revealing TRIP behavior and provides insights to guide the design of ductile, high-performance HEAs for critical applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Phase Transformations, Mechanical Properties |