摘要
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 internal defects （void/crack） controlling and forecasting in metal material and the current research situation of crack healing work, the common preparation methods for inner cracks in reparative research process were reviewed./n view of the deficiency of the current crack healing simulation research work, it shows the difference between molecular dynamics method and cellular automaton （CA） method. In the CA model based on 2D mesoscopic scale, new ideas and directions of how to simulate defects healing in metallic materials were proposed. Based on Microsoft Visual C＋＋ programming platform, three different forms of internal cracks under the condition of CA model （microcracks in grain intergranular microcracks 、transgranular microcracks） were set up. The transgranular crack healing process under dynamic recrystallization conditions was furtherly simulated, and a reasonable theory repairing results can be obtained.
出处
《热加工工艺》
CSCD
北大核心
2014年第12期54-57,61,共5页
Hot Working Technology
基金
上海市教委科研创新重点项目(12ZZ183)
上海工程技术大学校基金(2012gp26
13KY0514)
