The present work studies the effects of solid solution Gd on the texture and lattice strain evolution of an extruded Mg15Gd alloy under uniaxial compression. In situ experiments were carried out using high energy X-ray diffraction on samples of the investigated materials with three different orientations. The original textures of the pure Mg and the Mg15Gd alloy exhibit basal planes that are preferentially parallel and perpendicular to the extrusion direction (ED), respectively. The c/a ratio of the Mg15Gd alloy decreases with increasing Gd content in the solid solution, leading to a different deformation behavior compared with pure Mg under the compressive load. The addition of Gd enhances the slip and twinning modes. However, prismatic slip is activated earlier in the Mg15Gd alloy due to the lower c/a ratio.

本工作研究了固溶体Gd对挤压Mg15Gd合金单轴压缩下组织和晶格应变演变的影响。使用高能X射线衍射对三种不同取向的被研究材料样品进行原位实验。纯Mg和Mg15Gd合金的原始织构呈现出分别平行于挤压方向（ED）和垂直于挤压方向（ED）的基面。Mg15Gd合金的c / a比随固溶体中Gd含量的增加而降低，与纯Mg在压缩载荷下的变形行为不同。Gd的添加增强了滑移和孪生模式。但是，由于较低的c / a比，棱柱形滑移在Mg15Gd合金中较早地被激活。