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为了明确固溶、时效、以及固溶+时效处理对挤压变形Al-4%Mg-1.0%Ce合金循环变形行为的影响,针对不同处理状态的挤压变形Al-4%Mg-1.0%Ce合金进行了总应变幅控制下的低周疲劳实验。结果表明,挤压变形Al-4%Mg-1.0%Ce合金经过热处理后,循环变形抗力降低;不同处理状态的挤压变形Al-4%Mg-1.0%Ce合金均可呈现出循环硬化和循环稳定;在较高的外加总应变幅下,不同处理状态的挤压变形Al-4%Mg-1.0%Ce合金均会发生动态应变时效;固溶处理可以显著降低挤压变形Al-4%Mg-1.0%Ce合金的应变疲劳参数K’和n’,时效处理能够明显提高合金的K’和n’,而固溶+时效处理对合金的K’和n’影响不大。
In order to clarify the effect of solution and aging, as well as the effect of solution treatment and aging treatment on the cyclic deformation of Al-4% Mg-1.0% Ce alloy during extrusion, Al-4% Mg-1.0% Ce The alloy was subjected to a low cycle fatigue test under the control of total strain amplitude. The results show that the cyclic deformation resistance of the extruded Al-4% Mg-1.0% Ce alloy decreases after heat treatment. The cyclic deformation and the cycle of Al-4% Mg-1.0% At high applied strain rate, dynamic deformation aging occurred in Al-4% Mg-1.0% Ce alloy with different processing states. The solution treatment can significantly reduce the compressive deformation of Al-4% Mg -1.0% Ce alloy strain fatigue parameters of K ’and n’, aging treatment can significantly improve the alloy K ’and n’, and the solution treatment + aging on the alloy K ’and n’ little effect.