A MODEL OF PHASE TRANSITION FROM AUSTENITE TO MARTENSITE IN SINGLE-CRYSTAL NIMNGA ALLOYS

摘要：

A model is presented for the description of shape memory effect due to thethermoelastic martensite transformation induced by temperature,stress and magneticfield in ferromagnetic NiMnGa alloys.A cosine model on the basis ofthermodynamic principle is developed to describe the structural distortion of thelattice in the complex coupled field.The magnetic-field-induced stress is introducedand the equivalence principal is employed for the mechanical and magnetoelasticdeformation to represent the reorientation of the martensitic variants.Thecomparison between the theoretical and experimental results shows that the theoryprovides a good quantitative description of the material peculiar behavior.

关键词： Phase transition Lattice deformation Self-accommodation Ferromagnetic Shape memory effect

作者: Y.M.Pei D.N.Fang

作者单位: School of Science,Beijing Institute of Technology,Beijing 100081,ChinaFML,Department of Engineering FML,Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 691-695

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）