| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructural Processing and Phase Evolution Analysis of Off-stoichiometric Fe-Mn-Ga Shape Memory Alloy |
| Author(s) |
Nana A. Adoo, Nickolaus M Bruno, Grant A Crawford, Bharat Jasthi, Kharel Parashu, Wade Lein, Andrew Bernier |
| On-Site Speaker (Planned) |
Nana A. Adoo |
| Abstract Scope |
Fe-based magnetic shape memory alloys (MSMAs) have been of great interest to the scientific community as they have been shown to exhibit a metamagnetic phase transition, namely a concurrent reversible martensitic transition (MT) and change in magnetic ordering. The multiferroic transitions in these alloys have potential application as energy harvesters, solid-state magnetic coolants, sensors, and actuators. Unlike Ni-based MSMAs, Fe-based MSMAs have been reported to exhibit better ductility, however, the effect of processing on phase stability and the metamagnetic behaviors have rarely been studied. In this work, we show that non-transforming phases can form in FeMnGa MSMAs after homogenization treatments and that the large transformation hysteresis observed in these alloys is heavily influenced by the microstructure and alloy composition. The structure-property relationships in FeMnGa MSMA are investigated over a range of compositions (e/a ratio) and we present possible processing methods and compositions useful for engineering stable and transformable Fe-based MSMAs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Other |