About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Design of TWIP/TRIP Non-equimolar High-entropy Alloys |
Author(s) |
Xin Wang, Rafael Tomás Rodríguez De Vecchis , Chenyang Li, Wei Chen, Wei Xiong |
On-Site Speaker (Planned) |
Xin Wang |
Abstract Scope |
High-entropy alloys (HEAs) with transformation-induced plasticity/twinning-induced plasticity (TRIP/TWIP) attracted intense attention because of the excellent combination of strength and ductility. However, designing HEAs with TWIP/TRIP via the Edisonian approach is time and cost-consuming. Therefore, we demonstrated a new method utilizing the CALPHAD-based model and ab initio approach to predict the phase and deformation mechanism for a given composition. After screening ~100,000 CoxCryFezMnwNi100-x-y-x-w compositions, several compositions with different SFEs that cover the deformation mechanism from dislocation glide to TWIP and TRIP were selected and prepared. The designed alloys were systematically studied for the microstructure, mechanical property, and deformation mechanism. It was found that all the designed alloys have no intermetallic phases and show good ductility, and more than 80 % of the prepared alloys have TRIP/TWIP effects. |