对Cu-25.83 Zn-3.96Al(wt-%)形状记忆合金在分级淬火时发生的B_2→DO_3,有序转变过程进行了初步的动力学和热力学分析。结果表明在一定温度下,有序度S 随分级等温时间的增加几乎呈线性地上升,满足S=101T·exp(—Q/RT)·t(?)关系,Q 为DO_3有序过程的激活能,约为12.6kcal/mol(53kJ/mol)。形状回复温度T(?)则随等温时间增加而降低,并与S 有以下关系:T:=A+BS~2/1+CS~2,由实验数据回归,可得T(?)(K)=348(1+106S~2/1+122.8S~2
A kinetic and thermodynamic analysis of B_2→DO_3 ordering process ina Cu-25.83Zn-3.96Al(wt-%)alloy has been made.It is shown that the shaperecovery rate η,which is directly correlated with the ordering degree S,increases near linearly with the holding tim
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