| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Competing Interactions between Mesoscale Length-Scales, Order-Disorder, and Martensitic Transformation in Ferromagnetic Shape Memory Alloys |
| Author(s) |
Daniel Salas, Yuhao Wang, Thien Duong, Vahid Attari, Yang Ren, Yuriy Chumlyakov, Raymundo Arroyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Daniel Salas |
| Abstract Scope |
Metamagnetic Shape Memory Alloys (MMSMAs) exhibit a large magnetization change across the martensitic transformation (MT) due to the different magnetic ordering in the austenite and martensite phases, leading to strong interactions between configurational, thermal, structural and/or magnetic degrees of freedom. Recently, we have investigated the effects of composition, thermal processing parameters and the resulting microstructural changes on the martensitic transformation and ferromagnetic transition in Ni–Co–Mn–In MMSMAs. In this work it was found that the average L21 order domain size strongly affects all these MT characteristics, when below certain size, by controlling MS, and thus TCA-MS, since TCA is not as sensitive to the average L21 order domain size as MS. As a consequence, the martensitic transformation characteristics, like transformation temperatures, thermal hysteresis or magnetization change, in Ni–Co–Mn–In MMSMAs are a complex function of composition, atomic order microstructure, and of applied external magnetic field. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Magnetic Materials, |