| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
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| Presentation Title |
J-11: An Investigation on Transformation-induced-plasticity Mechanisms of Metastable Refractory Medium-entropy Alloys by Controlling Chemical Composition |
| Author(s) |
Yunjong Jung, Kangjin Lee, Jiwoon Lee, Junhee Han, Ke An, Chanho Lee, Peter Liaw, Gian Song |
| On-Site Speaker (Planned) |
Yunjong Jung |
| Abstract Scope |
Refractory high-entropy alloys (RHEA) exhibit outstanding mechanical properties, such as high temperature strength, creep resistance, and thermal stability. Nevertheless, most of reported RHEAs are less compatible with industrial applications than FCC-HEAs due to limited ductility. For this reason, several alloy design strategies to tailor phase stability results in the occurrence of mechanical twinning or phase transformation during deformation have been attempted to improve the ductility of RHEA.
In this study, we developed BCC-structured metastable refractory medium-entropy alloys (RMEAs) with the transformation-induced-plasticity (TRIP) effect by using Bo-Md diagram, which is known as a phase-stability diagram used for developing Ti alloys. This diagram allows for prediction of stability of BCC phase, which is associated with the martensitic phase transformation. To control the Bo-Md values, we designed Tix(ZrHf)yV0.1Nb0.1Ta0.1 medium-entropy alloys, and investigated the microstructure and deformation behavior, using scanning-electron microscope(SEM), X-ray diffraction(XRD), In-situ neutron diffraction(ND), and electron-backscatter diffraction(EBSD). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Phase Transformations |