Microstructural evolution of ZK60 magnesium alloys, during twin roll cast (TRC) and hot compression (HC) with a strain rate of 0.1 s−1 at 350 °C and subsequent annealing at temperatures of 250–400 °C for 102−5 × 105 s, has been observed by optical microscopy (OM), transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). The distribution of average grain size and recrystallized grain size at different annealing conditions were calculated. Activation energy and recrystallized volume fractions during annealing were discussed using analysis of static recrystallization (SRX) kinetics. Based on examination of microstructure evolution during annealing, it was found that several SRX mechanisms were co-activated. Subgrains with high misorientation angles to surrounding grains were formed by dislocation rearrangement, and they seemed to evolve into newly recrystallized grains.
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机译：ZK60镁合金在双辊铸造（TRC）和热压缩（HC）过程中在350°C时应变率为0.1 s -1 的微观组织演变，随后在250-400°C的温度下退火通过光学显微镜（OM），透射电子显微镜（TEM）和电子背散射衍射（EBSD）观察到C持续10 2 -5×10 5 s。计算了不同退火条件下平均晶粒尺寸和重结晶晶粒的分布。使用静态重结晶（SRX）动力学分析，讨论了退火过程中的活化能和重结晶体积分数。通过检查退火过程中的微观结构演变，发现有几种SRX机制被共同激活。通过位错重排形成了与周围晶粒高取向差的亚晶粒，它们似乎演化为新的再结晶晶粒。
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