轧制工艺和退火制度对双相Mg-8Li合金显微组织的影响

Influence of Rolling Process and Annealing Condition on Microstructure of Dual-phase Mg-8Li Alloy

通过金相显微分析技术系统研究了双相Mg-8Li合金在单向轧制和交叉轧制工艺以及不同退火制度下的显微组织变化。结果表明,交叉轧制工艺可以减弱合金的各向异性,使得α相和β相呈现较为均匀的分布,从而改变了原有的带状组织特征;退火过程中,随着温度和时间的增加,合金晶粒逐渐增大并呈现出等轴特征,发生了较为完全的再结晶过程。

This study systematically investigates the microstructural changes of dual-phase Mg-8Li alloy under both unidirectional and cross rolling processes,as well as different annealing conditions,using metallographic microscopy analysis.The results demonstrate that cross rolling can mitigate the alloy's anisotropy,resulting in a more uniform distribution ofαandβphases and altering the original banded microstructure.During annealing,as temperature and duration increase,the grain size of the alloy gradually enlarges and exhibits equiaxed features,indicating a significant recrystallization process.Overall,cross rolling improves the distribution of the alloy's microstructure and reduces its performance anisotropy.