Cu-Cr-Zr合金等温时效动力学研究

Study on isothermal aging kinetics of Cu-Cr-Zr alloy

摘要:

通过测试Cu-Cr-Zr合金在等温时效过程中电阻率的变化，对铜合金的等温时效动力学进行了研究。实验结果表明，Cu-Cr-Zr合金的时效电阻率ρt与时间 t的时效曲线有两个拐点，分别对应着时效析出的两个过程。同时通过理论推导，得出合金的时效动力学公式ρ＝ρmin ＋（ρmax -ρmin ）exp（-kτn ），通过对动力学公式二阶导数的分析，从理论上证明了合金等温时效两个析出过程的存在性。

Abstract:

In this paper ,isothermal aging kinetics were studied by testing the electronic resistivity change of Cu-Cr-Zr alloy during isothermal aging .The results showed that there were two points of inflexion in the aging curve which the electronic resistivity is related to the aging time ,meaning that two precipitation processes occurred during the aging of Cu-Cr-Zr alloy .The alloy effectiveness dynamics formula :ρ=ρmin +(ρmax -ρmin )exp(-kτn ) was derived ,confirming the existence of the two separation/precipitation processes on isothermal aging mathematically through dynamics formula's analysis .