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为了揭示孔洞在FCC晶体中的长大规律,研究了含圆柱形孔洞的铝单晶试样在平面应变压缩条件下的变形情况,采用EBSD(Electron Backscatter Diffraction)对孔洞周围的不均匀变形以及晶体取向变化进行分析,并通过编制率相关有限元用户子程序,采用晶体有限元模拟了含圆柱形孔洞的铝单晶试样在平面应变压缩条件下的变形。实验结果与模拟结果的对比表明:晶体取向对孔洞的长大行为影响较大;率相关晶体有限元能很好地预测孔洞周围晶体取向的变化,该方法可较好地模拟FCC晶体中孔洞的长大行为,为研究FCC晶体中孔洞的演化以及断裂行为提供了一种有效的分析方法。
In order to reveal the regularity of growth of holes in FCC crystals, the deformation of aluminum single crystal samples with cylindrical holes under the condition of plane strain compression was studied. EBSD (Electron Backscatter Diffraction) The change of orientation was analyzed. The finite element method of finite element method was used to simulate the deformation of aluminum single crystal samples with cylindrical holes under plane strain compression by programming the user-related finite element program. The comparison between the experimental and simulation results shows that the crystal orientation has a great influence on the growth behavior of the hole. The rate-dependent crystal finite element method can well predict the change of the crystal orientation around the hole. This method can better simulate the hole growth in the FCC crystal The behavior of growing up provides an effective analytical method for studying the evolution and fracture behavior of voids in FCC crystals.