Cu-Ni-Si合金时效早期动力学研究

Study on early aging stage kinetics in a CuNiSi alloy

通过对固溶态 Cu-Ni-Si合金时效时电阻变化规律的分析,研究了合金时效早期的析出行为,并借助透射电镜观察合金时效析出相的组织形态。根据Avrami 经验公式导出了合金在一定温度下时效的Avrami相变动力学经验方程,在此基础上计算出合金在不同温度下时效的相变开始时间。

By analysing the electric resistance variation of the solid solution Cu-Ni-Si alloy in the process of aging, precipitation behavior of the early aging stage was studied. The morphology of precipitates was observed by means of transmission electron microscope. Then, the transformation kinetics equation was educed from the Avrami empirical formula, on the basis of this equation, transformation kinetics curve can be drawn and the time for starting transformation can be calculated at different aging temperatures.