| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
|
| Presentation Title |
Effect of Mesoscale L21 Domain Size on the Nucleation of Thermoelastic Martensitic Transformation in Ni45Co5Mn36.7In13.3 Magnetic Shape Memory Alloys |
| Author(s) |
Juan Carlos Lago, Woohyun Cho, Daniel Salas, Yijia Zhang, Ibrahim Karaman, Patrick Shamberger |
| On-Site Speaker (Planned) |
Juan Carlos Lago |
| Abstract Scope |
The types of defects that can aid martensitic transformation and affect the nucleation barrier, thermal hysteresis, and reversibility require further investigation. Particularly the effect of mesoscale L21 domain size on thermoelastic martensitic nucleation remains unclear. Understanding defects as potent nucleation sites is vital to improving magnetocaloric and shape memory alloys' energy conversion and fatigue life. Furthermore, as the thermal hysteresis increases in small length scales, the role of potent defects becomes critical in controlling nucleation. In this study, nucleation potency distributions of Ni45Co5Mn36.7In13.3 microparticles were used to investigate L21 order domain size effects. The defect state across particle sizes was evaluated by comparing the martensitic transformation characteristics of solution heat-treated and secondary annealed samples during temperature-dependent magnetization measurements. The resulting martensitic transformation loops were the basis for comparing the nucleation potency of L21 domain sizes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Phase Transformations, Powder Materials |