The bendability of Mg–Gd binary alloy at room temperature is significantly improved through the pre-compression and subsequent annealing (PCA) process. The results show that the formed angle of PCA sample (36°) is more excellent compared with the as-extruded (AE) sample (115°) during three-point bending test, which is mainly attributed to the variation of deformation mechanisms in the tension region. Basal slip dominates the tension strain in the extrados of AE sample, while {10–12} tension twinning and basal slip are activated simultaneously in the same region of PCA sample. The activation of {10–12} twins leads to higher Schmid factor (SF) for basal slip. It provides more prismatic <a> slip activity in the twined areas, which enhance the coordination in thickness strain of PCA sample during the bending test. Therefore, the PCA process gives an insightful information for ameliorating bendability of Mg alloy.

通过预压缩和随后的退火（PCA）工艺，Mg-Gd二元合金在室温下的可弯曲性得到了显着改善。结果表明，在三点弯曲试验中，PCA样品的成形角（36°）比挤压成型（AE）的样品（115°）更好，这主要是由于变形机理的变化所致。紧张地区。基底滑移在AE样本的外向中主导着张力应变，而{10-12}张力孪生和基底滑移在PCA样本的同一区域中同时被激活。{10-12}双胞胎的激活导致基底滑移的Schmid因子（SF）更高。它在缠绕区域提供了更多棱柱形的<a>滑动活动，从而增强了弯曲试验过程中PCA样品厚度应变的协调性。因此，