Martensitic Transformation and Magnetic-Field-Induced Strain in Magnetic Shape Memory Alloy NiMnGa Melt-Spun Ribbon

被引：0

作者：

Shihai GUO Yanghuan ZHANG Jianliang LI Baiyun QUAN Yan QI and Xinlin WANG Department of Functional Material Research Central Iron and Steel Research Institute Beijing China ^{[100081
]}

机构：

来源：

Journal of Materials Science & Technology | 2005年 / 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：

TG139.6 [];

学科分类号：

080502 ;

摘要：

<正>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 thermo-elastic 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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