Abstract
The influence of thermal treatments on the reverse martensitic transformation (MT) and damping behaviour of Ni50Mn37.5Sb10.5Al2 and Ni50Mn37.5Sb4.5Al8 metamagnetic shape memory alloys was investigated. Thermal annealing was performed in situ during mechanical spectroscopy measurements, with the annealing temperature systematically increased to assess its effect on the reverse MT. Recovery and precipitation processes were identified and their influence on the reverse MT analysed. The results reveal a sharpening of the MT, a shift of the MT damping peak temperatures, and an increase in the MT peak height. Different damping mechanisms associated with twin-boundary motion and dislocation–vacancy interactions were identified. Amplitude-dependent damping analysis reveals a characteristic evolution of the S coefficient, reflecting the competition between the transient and non-transient dissipation mechanisms during the transformation.
| Original language | English |
|---|---|
| Article number | 065017 |
| Journal | Smart Materials and Structures |
| Volume | 35 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2026 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was partially supported by PIP-CONICET 11220210100073CO (2022–2024), the PPCT-UNR 80020220600018UR (2023–2026), the PID-UNR 80020220700026UR (2023–2026), the Cooperation Agreement between the Universidad Nacional de Rosario and the Universidad Publica de Navarra, Res. C. S. 3812/2021 (2021–2026) and Res. C. S. 5357/2026 (2026-2027) and the Collaboration Agreement between the Universidad Nacional de Rosario and the Universidad del País Vasco, Res. C. S. 2519/2021 (2021–2026) and pending Res. (2026-2031) and the Spanish Agencia Estatal de Investigación (AEI), Ministerio de Ciencia e Innovación (Project PID2022-138108OB-C32 (MCIU/AEI/FEDER, UE)).
Keywords
- martensitic transformation
- mechanical spectroscopy
- metamagnetic shape memory alloys
- Ni–Mn–Sb–Al
- thermal annealing
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