A high-ductility Mg–8.10Al–0.42Zn–0.51Mn–1.52La–1.10Gd–0.86Y (wt%) alloy was developed by hot extrusion and multi-rolling processes. Relationships between microstructure, mechanical properties and texture evolution of the extruded and rolled alloy were investigated. The rolling process had significant effect on grain refinement of the extruded plate. The grain size reduced from 12.3 to 4.9 μm with the increasing rolling pass. With the increase in rolling pass, the proportion of dynamic recrystallized (DRXed) grains increases due to particle-stimulated nucleation, grain boundary nucleation and twin induced nucleation. In the process of multiple rolling, the basal pole gradually tilted from normal direction to transverse direction due to the asymmetric deformation and irregular grain deformation, resulting in the weakening of the base texture. The results showed that grain refinement and texture weakening were the main reasons for the good ductility of the alloy.

中文翻译：

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Mg-Al-Zn-La-Gd-Y镁合金热挤压和多道次轧制的组织，力学性能和织构演变

通过热挤压和多辊轧制工艺开发了高延展性的Mg-8.10Al-0.42Zn-0.51Mn-1.52La-1.10Gd-0.86Y（wt％）合金。研究了挤压和轧制合金的组织，力学性能与组织演变之间的关系。轧制过程对挤压板的晶粒细化具有重要影响。随着轧制道次的增加，晶粒尺寸从12.3减小到4.9μm。随着轧制道次的增加，动态再结晶（DRXed）晶粒的比例由于颗粒刺激形核，晶界形核和孪生诱导形核而增加。在多次轧制过程中，基极由于不对称变形和不规则晶粒变形而从法线方向逐渐向横向倾斜，从而导致基础纹理的减弱。