中文摘要：

对挤压态Mg-8Er合金在再结晶热处理过程中组织、织构的演变以及相应的力学行为进行了系统表征,在此基础上分析了塑性变形机理。结果表明,挤压态Mg-8Er合金在500℃条件下退火时,随着保温时间的延长,再结晶组织的逐渐形成,织构出现明显的随机化,织构强度也显著弱化,合金的室温塑性也随之提高。热处理态Mg-8Er合金的塑性大小主要取决于再结晶程度的大小。再结晶程度高的合金织构也更加随机化,从而获得高塑性。

英文摘要：

In this paper,the evolution of microstructure,texture and the corresponding mechanical behaviors of extruded Mg-8 Er alloy are investigated systematically during recrystallized heat treatment. It is found that at 500 ℃,with the increase of the annealing time,the deformed microstructure becomes more recrystallized. Corresponding to the increase of recrystallized microstructure,the plastic elongations are also enhanced. The improvement of plasticity is mainly originated from the progress of recrystallized microstructure and the associated randomization and weakness of the texture.