About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
TWIP/TRIP CoCrFeMnNi Multi-principal Element Alloys Examined by In-situ Synchrotron X-ray Diffraction |
Author(s) |
David D. S. Silva, Jiajia Shen, Gustavo Bertoli, João P. Oliveira, Michael Kaufman, Amy Clarke, Francisco Coury, Claudemiro Bolfarini |
On-Site Speaker (Planned) |
David D. S. Silva |
Abstract Scope |
Non-equiatomic, CoCrFeMnNi multi-principal element alloys (MPEAs) with varied compositions (Co((80-X)/2)Cr((80-X)/2)FeXMn10Ni10, with x = 30, 40 and 50) (at.%) were developed to be single-phase, face centered cubic (FCC) and display high strengths enhanced by transformation and/or twinning-induced plasticity (TRIP and/or TWIP). While studies have been conducted to investigate the transition from TWIP to TRIP, the contribution of each mechanism to optimize mechanical behavior is still unknown. The micro-mechanical behavior of newly-developed MPEAs during tensile deformation was investigated using in-situ synchrotron X-ray diffraction. The formation and evolution of the hexagonal close-packed (HCP) martensite phase, mechanical twins, and nanoscale structure were examined by using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Here we show that good strength/ductility combinations are primarily due to the TRIP effect. These findings highlight the potential of compositional tuning to modify the phase stability and enhance the activation of multiple deformation mechanisms in CoCrFeMnNi MPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Characterization, Mechanical Properties |