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 |
Deformation Induced Transformation in Metastability Engineered Alloys |
Author(s) |
Rajiv S. Mishra |
On-Site Speaker (Planned) |
Rajiv S. Mishra |
Abstract Scope |
Transformative complex concentrated alloys provide opportunities for tunable performance by manipulating deformation mechanisms. We have studied Fe-Mn-Co-Cr-Si-Cu-V alloys that exhibit a combination of phase transformation and twinning. The Burgers triangle depicts the deformation induced transformation pathways among FCC, HCP and BCC crystal structures. Early studies were limited to a few elements and dilute alloys that have intrinsic allotropic phases in the temperature-pressure phase stability map. Iron is a particularly interesting element as it has temperature dependent FCC-BCC transformation and pressure dependent BCC-HCP transformation. Metastability engineering of Fe-Mn-Co-Cr-Si-Cu-V CCAs shrink the FCC-HCP-BCC transformation domain in the temperature and pressure ranges that are easily accessible experimentally with conventional mechanical testing methods. These alloys give greater flexibility for tailoring transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP). The tunable nature of these alloys opens up the possibility of designing hierarchical activation of deformation mechanics to explore plasticity related phenomenon. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Phase Transformations, Mechanical Properties |