基于CA法的金属材料内裂纹模型研究
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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.In 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.
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.In 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.
引文
[1]韩静涛,韦东滨,张永军.金属材料内裂纹愈合过程的物理与计算机模拟[Z].2003中国钢铁年会论文集,2003.
[2]张永军.金属材料内裂纹愈合过程的物理模拟与计算机模拟[D].北京科技大学,2003.
[3]Wei D B,Jiang Z Y,Han J T.Modelling of the evolution of crack of nanoscale in iron[J].Computational Materials Science,2013,69:270-277.
[4]赵中里,韩静涛,刘靖,等.钒对430不锈钢内裂纹热愈合的影响[J].热加工工艺,2007,36(14):6-8.
[5]傅士敏,肖亚航,刘建平.20CrMnTi钢内部裂纹愈合的热处理研究[J].热加工工艺,2007,36(8):18-21.
[6]张永军,韩静涛,任秀平,等.16Mn钢内裂纹愈合区域(组织、性能)的微观分析[J].北京科技大学学报,2006,28(2):129-132.
[7]张永军,薛凌,韩静涛,等.平板撞击试样热愈合处理内裂纹形态研究[J].钢铁研究学报,2003,15(6):52-55.
[8]张海龙,杨君刚,孙军.工业纯铁内部穿晶疲劳微裂纹的扩散愈合过程[J].金属学报,2002,38(10):1015-1020.
[9]杨君刚,张海龙,孙军.工业纯镁内部疲劳微裂纹的热扩散性愈合[J].金属学报,2005,41(8):819-823.
[10]陈飞.热锻非连续变形过程微观组织演变的元胞自动机模拟[D].上海交通大学,2012.
[11]马凯,张效迅.元胞自动机法在裂纹愈合模拟中的应用[J].精密成形工程,2012,4(6):45-49.
[2]张永军.金属材料内裂纹愈合过程的物理模拟与计算机模拟[D].北京科技大学,2003.
[3]Wei D B,Jiang Z Y,Han J T.Modelling of the evolution of crack of nanoscale in iron[J].Computational Materials Science,2013,69:270-277.
[4]赵中里,韩静涛,刘靖,等.钒对430不锈钢内裂纹热愈合的影响[J].热加工工艺,2007,36(14):6-8.
[5]傅士敏,肖亚航,刘建平.20CrMnTi钢内部裂纹愈合的热处理研究[J].热加工工艺,2007,36(8):18-21.
[6]张永军,韩静涛,任秀平,等.16Mn钢内裂纹愈合区域(组织、性能)的微观分析[J].北京科技大学学报,2006,28(2):129-132.
[7]张永军,薛凌,韩静涛,等.平板撞击试样热愈合处理内裂纹形态研究[J].钢铁研究学报,2003,15(6):52-55.
[8]张海龙,杨君刚,孙军.工业纯铁内部穿晶疲劳微裂纹的扩散愈合过程[J].金属学报,2002,38(10):1015-1020.
[9]杨君刚,张海龙,孙军.工业纯镁内部疲劳微裂纹的热扩散性愈合[J].金属学报,2005,41(8):819-823.
[10]陈飞.热锻非连续变形过程微观组织演变的元胞自动机模拟[D].上海交通大学,2012.
[11]马凯,张效迅.元胞自动机法在裂纹愈合模拟中的应用[J].精密成形工程,2012,4(6):45-49.