CuZnAl合金中热弹性马氏体相变的体积效应  

Volume Change During the Thermoeiastic Phase Transformation in CuZnAl Alloys

作　　者：李兵[1] 江伯鸿[1] 徐祖耀[1] 

机构地区：[1]上海交通大学材料科学系

出　　处：《上海交通大学学报》1992年第1期77-84,共8页Journal of Shanghai Jiaotong University

摘　　要：实验得到 CuZnAl 合金在热弹性马氏体相变时体积膨胀,但从点阵常数的变化来看应为体积收缩.应用马氏体相变晶体学表象理论(WLR 理论)并考虑到马氏体变态间的自协调效应,导出相变时体积变化率与点阵常数的数学关系.计算值与实验值能很好地吻合.Experimental results confirm that volume expansion occurs during th-ermoelastic martensitic transformation in CuZnAl alloy,which is contrary with the results from the change in lattice parameter.The phenomenological crystallogra-phic theory is employed to deal with this problem.On the basis of self-accommoda-tion among the martensite variants,a mathematic expression of the relationship between the volume change rate and the lattice parameter can be deduced.There is a good agreement between calculated and experimental results.

关 键 词：马氏体 热弹性 相变 铜合金 体积 

分 类 号：TG146.11[一般工业技术—材料科学与工程]