Cu-Be-Co-Zr合金时效析出动力学

Phase Transformation Kinetics of Cu-Be-Co-Zr Alloy during Aging Treatment

摘要:

研究了Cu-Be-Co-Zr合金480℃恒温时效条件下的时效析出动力学。根据导电率与析出相体积分数的关系,计算了Cu-Be-Co-Zr合金不同时效时间(0, 30, 60, 120, 180, 240, 360, 480, 600 min)对应的析出相转变比率,建立了Cu-Be-Co-Zr合金480℃时效条件下的析出相变动力学方程和导电率方程,并在此基础上绘制了等温转变动力学S曲线；采用固态热分解反应机理的积分方程,揭示了Cu-Be-Co-Zr合金时效析出转变机制为受扩散控制的反应机理。

Abstract:

Phase transformation kinetics of Cu-Be-Co-Zr alloy during aging treatment was investigated in this study. Based on the relationship between electrical conductivity and volume fraction of precipitates, the phase transformation ratio of Cu-Be-Co-Zr alloy aged at 480 degrees Celsius for different holding time (0, 30, 60, 120, 180, 240, 360, 480, and 600 min) were calculated. The kinetics equation of phase transformation and the electrical conductivity equation were derived, respectively. The isothermal transformation kinetics S-curves of Cu-Be-Co-Zr alloy was drawn. By using the integral equation of solid thermal decomposition reaction mechanism, the phase transformation mechanism of Cu-Be-Co-Zr alloy is controlled by three dimensions of diffusion.