典型文献
Effect of Initial Grain Size on the Hot Deformation Behavior and Microstructural Evolution of Pure Copper
文献摘要：
The influences of initial grain size(IGS)with 20 μm and 50 μm on the hot flow behavior and microstructural changes of pure copper were investigated using hot compression tests at a temperature range of 623-1073 K and strain rate range of 0.001-0.1 s-1.The effects of critical stress and corresponding critical strain were studied based on the internal and external processing parameters.The critical stress and strain decreased with increasing temperature and decreasing strain rate.The investigation results of the microstructure and true strain-stress diagrams showed that dynamic recovery,dynamic recrystal-lization(DRX),and twinning mechanisms were caused during the hot deformation of pure copper.Microstructure evolution indicated some DRXed fine-grain took place around grain boundary of hot deformed samples with IGS of 20 μm whereas DRXed fine-grain took place in interior grains for samples with larger IGS.The results also showed that grain growth is also dependent on IGS as the grain growth rate for samples with the larger IGS is greater than the smaller IGS.The critical strain rate and the temperature were obtained at 0.01 s-1 and 973 K,respectively,for the sudden change in the grain growth rate.Also,twinning highly depended on IGS which almost did not happen in fine grain size while the volume fraction of twinning increased with increasing grain size.
文献关键词：
中图分类号：
作者姓名：
H.R.Rezaei Ashtiani;A.A.Shayanpoor
作者机构：
School of Mechanical Engineering,Arak University of Technology,38135-1177,Arak,Iran
文献出处：
引用格式：
[1]H.R.Rezaei Ashtiani;A.A.Shayanpoor-.Effect of Initial Grain Size on the Hot Deformation Behavior and Microstructural Evolution of Pure Copper)[J].金属学报（英文版）,2022(04):662-678
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B类：
Effect,Initial,Grain,Size,Hot,Deformation,Behavior,Microstructural,Evolution,Pure,Copper,influences,initial,size,IGS,hot,flow,behavior,microstructural,changes,pure,copper,were,investigated,using,compression,tests,temperature,range,strain,rate,effects,critical,stress,corresponding,studied,internal,external,processing,parameters,decreased,increasing,decreasing,investigation,results,microstructure,true,diagrams,showed,that,dynamic,recovery,recrystal,lization,twinning,mechanisms,caused,during,deformation,Microstructure,evolution,indicated,some,DRXed,fine,took,place,around,boundary,deformed,samples,whereas,interior,grains,larger,also,growth,dependent,greater,than,smaller,obtained,respectively,sudden,Also,highly,depended,which,almost,did,not,happen,while,volume,fraction,increased
AB值：
0.517568
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