March 3, 2026

Thermomagnetic Characteristics of Martensitic Transformation in the Ni50Mn18.5Ga25Cu6.5 Alloy with the As-Cast and Recrystallized Equiaxed Structures

Key Points

Martensitic and magnetic phase transitions occur simultaneously during thermal analysis, enhancing material applicability.
Annealing at 1123 K for 2 hours led to an equiaxed grain structure averaging 200 µm in size, impacting thermomagnetic properties.
Combined thermal and thermomagnetic analysis was performed on both as-cast and recrystallized alloy states, offering insights into structural changes.
The transformation from as-cast to recrystallized structure did not significantly change the thermal properties, indicating stability.

Abstract

The thermal and thermomagnetic properties of the Ni50Mn18.5Ga25Cu6.5 alloy were studied in the as-cast state and after recrystallization annealing of the strain-hardened structure. It was shown that annealing of the pre-strain-hardened structure at 1123 K for 2 h leads to the formation of an equiaxed grain structure with an average crystallite size of approximately 200 µm. Combined thermal and thermomagnetic analysis demonstrated a simultaneous martensitic and magnetic phase transition. The transformation of the as-cast structure resulted in no significant changes in the thermal and thermomagnetic properties of the martensitic transition.

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Cite This Study

Gaifullin et al. (Mon,) studied this question.

synapsesocial.com/papers/69a7687fbadf0bb9e87e4daa https://doi.org/https://doi.org/10.1134/s0031918x25601106

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