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 |
D-16: Innovative Engineering to Create Massively Low-energy Interfaced Metastable High Entropy Alloys via Multi-directional Forging |
Author(s) |
Priyanka Agrawal, Ravi Sankar Haridas, Aishani Sharma, Rajiv S. Mishra |
On-Site Speaker (Planned) |
Priyanka Agrawal |
Abstract Scope |
The work employed Multidirectional forging (MDF), a severe plastic deformation technique, to create massively interfaced microstructure. The alloy for the study was a metastable high entropy alloy (HEA) that exhibits transformation-induced plasticity (TRIP) from γ-fcc to ε-hcp, with 1 at% V addition to nucleate strain induced α-bcc. The strategy for MDF was ~15% compression in the ABC direction and milling tensile sample at each stage of compression and test till fracture. This approach activated a large number of compression and tension twins which are low-energy interfaces, coherent or semi-coherent in nature. The AB and ABC compression + tension led to the recovery of γ-fcc which could be due to detwinning. Thus, the innovative engineering of TRIP HEA via MDF, enhanced the strength-toughness synergy where more energy from the impact was absorbed by the low-energy interfaces, thus mitigating the impact. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Phase Transformations, Process Technology |