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对AZ31镁合金进行了冷锻和冷压缩变形,并研究了其在此过程中的组织演变和再结晶动力学。实验结果表明,再结晶分数与退火时间之间的关系可以用JMAK等式来描述。根据动力学分析,可以计算出冷锻和冷压缩的再结晶激活能分别为53.5kJ/mol和85.1kJ/mol。冷压缩处理后的AZ31镁合金的再结晶激活能高于冷锻变形的,这主要与冷锻变形提供了更多的形核点有关。
Cold forging and cold compression deformation of AZ31 magnesium alloy were carried out. The microstructure evolution and recrystallization kinetics of AZ31 magnesium alloy were studied. The experimental results show that the relationship between recrystallization fraction and annealing time can be described by the JMAK equation. According to the kinetic analysis, the recrystallization activation energies of cold forging and cold compression can be calculated as 53.5 kJ / mol and 85.1 kJ / mol, respectively. The cold recrystallization activation energy of AZ31 magnesium alloy is higher than that of cold forging deformation, which is mainly related to the more nucleation sites provided by cold forging deformation.