铸态及快淬态Ni_(50)Mn_(26)Ga_(19)Fe_5合金的磁致应变  

Magnetic-field-induced Strains of As-cast and Melt-spun Ni_(50)Mn_(26)Ga_(19)Fe_5 Alloys

作　　者：郭世海[1] 张羊换[1] 祁焱[1] 全白云[1] 王国清[1] 王新林[1] 

机构地区：[1]钢铁研究总院功能材料研究所,北京100081

出　　处：《材料工程》2006年第10期31-33,47,共4页Journal of Materials Engineering

基　　金：国家863计划新材料领域课题资助(2001AA327022)

摘　　要：研究了铸态及快淬Ni50Mn26Ga19Fe5掺杂合金的磁致应变性能。结果表明,掺Fe的Ni-Mn-Ga合金也具有典型的热弹性马氏体相变过程和磁转变过程,但铸态合金的结构为7层调制型马氏体(7M),而快淬合金的结构为14层调制型马氏体(14M)。铸态合金最大磁致应变可达0.1%,快淬薄带合金最大磁致应变只能达到0.0095%。Ni50Mn26Ga19Fe5铸态合金比快淬合金有更大的磁致应变,说明掺杂元素Fe在Ni-Mn-Ga合金中的作用较为复杂。The magnetic-field-induced strains （MFIS） of as-cast and melt-spun Ni50 Mn26 Ga19 Fe5 alloy with the substitution of Ga by Fe were investigated. The experimental results show that Ni50Mn26Ga19 Fes alloy exhibits a typical thermal-elastic martensitic transformation and a magnetic transition. However, the as-cast alloy has a seven-layered modulated martensite （7M） structure and the melt-spun alloy has a fourteen-layered modulated martensite （14M） structure. The maximum MFIS of as-cast alloy is 0.1% and the MFIS of melt-spun alloy is only 0. 0095 %. The MFIS of as-cast alloy is larger than the MFIS of melt-spun alloy, which shows that the effect of Fe on Ni-Mn-Ga alloy is complex.

关 键 词：Ni—Mn-Ga 磁性形状记忆合金 磁致应变 快淬 

分 类 号：TG139.6[一般工业技术—材料科学与工程]