The Effect of Grain Boundary Sliding and Strain Rate Sensitivity on the Ductility of Ultrafine-Grained Materials

摘要：

Most ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) exibit only limited ductility which is correlated with the low strain rate sensitivity (SRS) of these materials. Recently, it was demonstrated that SPD is capable of increasing the room temperature ductility of aluminum-based alloys attaining elongations up to 150%, together with relatively high strain rate sensitivity. In the present work, additional results and discussions are presented on the effect of grain boundary sliding (GBS) and SRS on the ductility of some UFG metals and alloys. The characteristics of constitutive equations describing the steady-state deformation process are quantitatively analyzed for a better understanding of the effects of grain boundaries and strain rate sensitivity.

作者: Nguyen Q.Chinh Tamas Csanadi Jeno Gubicza Ruslan Z.Valiev Boris B.Straumal Terence G.Langdon

作者单位: Department of Materials Physics,Eotvos Lorand University,H-1117 Budapest,Hungary Institute of Physics of Advanced Materials,Ufa State Aviation Technical University,Ufa 450000 Russia Institute of Solid State Physics,Russian Academy of Sciences,Chernogolovka,Moscow district,142432 Ru Departments of Aerospace & Mechanical Engineering and Materials Science,University of Southern Calif

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 677-682

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）