EFFECT OF STRAIN RATE ON THE HIGH-TEMPERATURE COMPRESSIVE DEFORMATION BEHAVIOR OF ULTRAFINE-GRAINED COPPER

摘要：

The high-temperature deformation and damage behavior of ultrafine-grained (UFG) Cu produced by equal channel angular pressing (ECAP) were investigated and compared at two strain rates of 10-2 s-1 and 10-3 s-1. It is found that the strain rate has an obvious effect on the deformation and damage behavior of UFG Cu, especially at the testing temperatures near and above recrystallization. In general, the lower the strain rate, more universally grain coarsening takes place, the lower the yield stress and steady flow stress are, and more aggravated the degree of deformation damage becomes.

关键词： Ultrafine-grained copper ECAP strain rate high temperature compressive deformation

作者: XIAO-WU LI QING-WEI JIANG YIN LIU YAO WANG

作者单位: Key Laboratory for Anisotropic and Texture of Materials, Ministry of Education, Northeastern Univers Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, P.O.Box

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1758-1763

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）