Martensitic transformation and magnetic-field-induced strain in magnetic shape memory alloy NiMnGa melt-spun ribbon

被引：0

作者：

Guo, SH ^{[1
]}

Zhang, YH ^{[1
]}

Li, JL ^{[1
]}

Quan, BY ^{[1
]}

Qi, Y ^{[1
]}

Wang, XL ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Dept Funct Mat Res, Beijing 100081, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2005年 / 21卷 / 02期

关键词：

shape memory alloy; ferromagnetism; melt-spinning; martensitic transformation; magnetic-field-induced strain;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A magnetic shape memory alloy with nonstoichiometric Ni50Mn27Ga23 was prepared by using melt-spinning technology. The martensitic transformation and the magnetic-field-induced strain (MFIS) of the polycrystalline melt-spun ribbon were investigated. The experimental results showed that the melt-spun ribbons underwent thermal-elastic martensitic transformation and reverse transformation in cooling and heating process and exhibited typical thermoelastic shape memory effect. However the start temperature for martensitic transformation decreased from 286 K for as-cast alloy to 254 K for as-quenched ribbon and Curie temperature remains approximately constant. A particular internal stress induced by melt-spinning resulted in the formation of a texture structure in the ribbons, which made the ribbons obtain larger martensitic transformation strain and MFIS. The internal stress was released substantially after annealing, which resulted in a decrease of MFIS of the ribbons.

引用

页码：211 / 214

页数：4

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