| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Young Leaders International Scholar – JIM: Co-based Heusler Alloys with Reentrant Martensitic Transformation Behavior: Fundamentals and Application Possibilities |
| Author(s) |
Xiao Xu, Takeshi Kanomata, Ryosuke Kainuma |
| On-Site Speaker (Planned) |
Xiao Xu |
| Abstract Scope |
In this presentation, I would like to deliver a brief review on the unique reentrant martensitic transformation (RMT) behavior in Co-based Heusler alloys. In Co2Cr(Ga,Si) alloys, an RMT behavior was reported. By this phenomenon, novel physical phenomena, such as the cooling-induced shape memory effect and inverse temperature dependence of superelastic stress, were reported. For a deeper understanding on these phenomena, the experimental phase diagrams, including the composition versus temperature (), magnetic field versus temperature () and uniaxial stress versus temperature () phase diagrams, will be introduced. The occurrence of the RMT behavior was found to be the result of the competition between the entropy change of the martensitic transformation and magnetic entropy of parent phase. A brief explanation of the thermodynamic analysis on the RMT behavior will be provided. Furthermore, application possibilities by the use of RMT behavior will also be discussed in this talk. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |