Abstract The influence of equal channel angular pressing (ECAP) on the microstructure, texture evolution and mechanical properties of extruded Mg-5.0Zn-0.5Ca-0.3Mn (weight percent) alloy has been systematically investigated in the current study. A typical ultra-fine grained (UFG) structure is obtained in the as-ECAPed alloy for 4 passes, due to a completed recrystallization process. With the increasing ECAP pass, the conventional basal texture can be gradually changed to an asymmetric non-basal texture with its basal plane inclined to normal and transverse directions ∼45°, which is related to the typical shear mode, leading to an obvious increase of Schmid factor for the activation of basal slip system. The room-temperature tensile yield strength, microhardness and ductility of extruded alloy are simultaneously improved by successive ECAP processing, which is derived from the grain refinement and texture modification.

中文翻译：

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等通道角压加工同时提高强度和延展性的超细晶粒Mg-Zn-Ca-Mn合金

摘要 本研究系统地研究了等通道角挤压 (ECAP) 对挤压 Mg-5.0Zn-0.5Ca-0.3Mn（重量百分比）合金的显微组织、织构演变和力学性能的影响。由于完成了再结晶过程，在 4 道次 ECAPed 合金中获得了典型的超细晶粒 (UFG) 结构。随着 ECAP 道次的增加，传统的基底织构逐渐变为不对称的非基底织构，其基面向法线和横向倾斜 ∼45°，这与典型的剪切模式有关，导致显着增加用于激活基底滑动系统的 Schmid 因子。室温拉伸屈服强度，