On the kinetic arrest of martensitic transformation in Ni-Mn-In melt-spun ribbons
Kinetic arrest (KA) of martensitic transformation (MT) has been observed in as-solidified Ni$_{52.2}$Mn$_{34.3}$In$_{13.5}$ melt-spun ribbons; a characterization by dc magnetization measurements was carried out. These alloy ribbons transform martensitically from a single austenitic (AST) parent phas...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Mexicana de Física |
| Idioma: | inglés |
| OAI Identifier: | oai:ojs2.rmf.smf.mx:article/365 |
| Acceso en línea: | https://rmf.smf.mx/ojs/index.php/rmf/article/view/365 |
| Access Level: | acceso abierto |
| Palabra clave: | Ni-Mn-In ferromagnetic shape memory alloys melt-spun ribbons kinetic arrest of martensitic transformation |
| Sumario: | Kinetic arrest (KA) of martensitic transformation (MT) has been observed in as-solidified Ni$_{52.2}$Mn$_{34.3}$In$_{13.5}$ melt-spun ribbons; a characterization by dc magnetization measurements was carried out. These alloy ribbons transform martensitically from a single austenitic (AST) parent phase with B2-type crystal structure. For an applied magnetic field $\mu_0 H$ of 1 T and up to 9 T, a moderate but progressive KA of the MT is observed. The metastability of the non-equilibrium field-cooled glassy state was characterized by introducing thermal and magnetic field fluctuations. It was found that the total magnetization difference ($\Delta \sigma$) between the zero field-cooling (ZFC) and field-cooling (FC) pathways of the temperature dependence of magnetization $\Delta \sigma$($T$) shows irreversible and reversible components; the former decreases as the temperature decreases. After a short thermal annealing of 10 min at 1073 K AST shows a highly ordered L2$_1$-type crystal structure and the kinetic arrest of martensitic transformation is no longer observed suggesting a connection between the crystal structure order of austenite and the appearance of the kinetic arrest phenomenon. |
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