About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys IV: 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 |
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. The advent of complex concentrated alloys (CCAs) provides new opportunity to explore this space through metastability engineering. The metastability can be engineered through compositional and microstructural control. Our approach for such exploration is based on anchoring elements that show allotropic transformation. Iron is a particularly interesting element as it has temperature dependent FCC-BCC transformation and pressure dependent BCC-HCP transformation. Our original work on Fe-Mn-Co-Cr-Si-Cu-V CCAs is now being expanded with Ti, Zr and Co as anchoring elements. These alloys give greater flexibility for tailoring transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP). The tunable nature of these alloys opens the possibility of designing hierarchical activation of deformation mechanics to explore plasticity related phenomenon. |
Proceedings Inclusion? |
Planned: |