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根据金属材料内部缺陷(空洞/裂纹)控制预报和修复的重要性以及当前裂纹修复工作的研究现状,对修复性研究过程中常见的内裂纹制作方式进行综述。针对目前裂纹修复模拟研究工作的不足,比较了分子动力学法和元胞自动机(CA)法的差异。在二维介观尺度的CA模型基础上,提出金属材料内缺陷修复模拟的新思路和方向。基于Microsoft Visual C++编程平台,建立了CA模型条件下3种不同的内裂纹形式(即晶内、沿晶和穿晶微裂纹),且进一步模拟了动态再结晶条件下穿晶裂纹的愈合过程,得到了较为合理的理论修复结果。
According to the importance of predicting and repairing the internal defects (cavities / cracks) in metal materials and the current research status of the crack repair, the methods of making the internal cracks commonly used in the reparative research are reviewed. Aiming at the shortcomings of current crack repair simulation research, the differences between molecular dynamics and cellular automata (CA) method are compared. Based on the two-dimensional mesoscopic scale CA model, a new idea and direction for the simulation of defect repairing in metallic materials are proposed. Based on the Microsoft Visual C ++ programming platform, three different types of internal cracks (intragranular, transgranular and transgranular microcracks) under the CA model were established, and the healing process of transcrystalline cracking under dynamic recrystallization was further simulated. Get a more reasonable theory repair results.