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本文在塑性分切应变幅（γpl）为1．3×10-4－7．2×10-3范围内研究了双滑移取向铜单晶体的循环形变行为当γpl＜2×10-3，晶体的初始硬化速率θ0.2较低，几乎与应变幅大小无关。当γpl＞2×10-3，θ0．2随γpl的增加而显著增大． 晶体的循环应力－应变（CSS）曲线在5×10-4＜γpl＜4×10-3范围内呈现一个明显的平台，平台区的范围与单滑移晶体相比明显缩短，但平台区对应的饱和应力相近．和晶体虽然同处于标准取向三角形的001／边上．但其循环形变行为存在明显的差异，可归结为各个滑移系相对于晶体轴的几何位置不同，从而造成不同的滑移形变特征
In this paper, the cyclic deformation behavior of double slip oriented Cu single crystal was studied in the range of plastic strain strain (γpl) of 1.3 × 10-4-7.2 × 10-3. When γpl <2 × 10-3, the crystal The initial hardening rate θ0.2 is low, almost independent of the strain amplitude. When γpl> 2 × 10-3, θ0.2 increases significantly with the increase of γpl. The Cyclic Stress-Strain (CSS) curve of the crystal presents an obvious platform in the range of 5 × 10-4 <γpl <4 × 10-3. The range of the platform region is obviously shortened compared with the single-slip crystal, but the platform region corresponds to Saturation stress is similar. And while the crystal is on the 001 / edge of a standard orientation triangle. However, there are obvious differences in cyclic deformation behavior, which can be attributed to the different geometrical positions of each slip system with respect to the crystal axis, resulting in different slip deformation characteristics