Fe含量对Ni-Fe-Ga合金马氏体相变的影响  

Effect of the Chemical Composition to Martensitic Rransformation in Ni-Fe-Ga Alloys

作　　者：余华军[1] 许永强[1] 武华[1] 

机构地区：[1]赣南师范学院物理与电子信息学院,江西赣州341000

出　　处：《赣南师范学院学报》2011年第3期43-46,共4页Journal of Gannan Teachers' College(Social Science(2))

基　　金：江西省科技支撑计划项目(ZDG03800)

摘　　要：利用金相显微技术和示差扫描量热法研究了合金成分对Ni-Fe-Ga铁磁形状记忆合金马氏体相变的影响,用X射线衍射方法分析了马氏体的结构类型.研究发现,Ni代替Fe显著提高合金的马氏体相变温度,每1%Ni可以使合金马氏体相变温度提高约40 K.X射线衍射表明Ni73.5-yFeyGa26.5合金773K真空退火后都只出现4M型晶体结构的马氏体.The effects of the chemical composition on the martensitic tranformation of Ni-Fe-Ga alloys were investigated by optical micrography,and differential scanning calorimeter methods.The structure type of martensitic phase was determined by X-ray diffraction.The results show that martensitic transformation temperatures increase quickly by the substitute of Ni for Fe element in Ni-Fe-Ga alloys.An approximately sharp increase was found in the order of ~40 ℃ atomic percent for Ni substitution for Fe.XRD patterns show that only 4M type of martensitic phases of Ni73.5-yFeyGa26.5 alloys appeared in bulk samples annealed at 773 K.

关 键 词：铁磁形状记忆合金 Ni-Fe-Ga 马氏体相变 

分 类 号：TG139.6[一般工业技术—材料科学与工程]