Flow Stress Constitutive Equation of Age Hardening Cu-1.1Cr Alloy during Hot Compression Deformation

摘要：

The Cu-1.1Cr alloys performed in this paper were prepared by thermal deformation + solution treatment + cold deformation + aging treatment + machining. The flow stress behavior of Cu-l.Icr alloy was investigated by isothermal compression on Gleeble-1500 hot simulator in the temperature range of 400-800°C and strain rate of 0.01-ls-1. The experimental results indicated that the flow stress of Cu-l.1Cr alloy depends on the strain rate and the deformation temperature. The flow stress increased with increasing strain rates and decreased with increasing temperature. The flow stress of Cu-l.lCr alloy during hot compression deformation could be represented by Zener-Hollomon parameter including the Arrhenius term. The values of n, a and A in the analytical expressions of flow stress are fitted to be n=15.696, α=0.005178MPa-1and A =1.289×1021s-1, respectively. The hot deformation activation energy is 346.738kJ/mol. The constitutive equation of the Cu-1.1 Cr alloy was obtainedε = 1.289 ×1021 sinh(0.005178σ)1/15.696 exp(-346738/RT).

关键词： Cu-1.1Cr alloy hot compression deformation constitutive equation flow stress

作者: Li Zhang Kexing Song Yanmin Zhang Qing Wang Weifeng Liu

作者单位: School of Materials Science and Engineering, Henan University of Science and Technology,Luoyang47100 School of Material Science & Engineering, Xian University of Technology, Xian 710048, China School

会议类型: 国际会议

会议名称: 2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)

会议地点: 重庆

会议语种:英文

页码: 623-627

在线出版日期: 2011-01-21（万方平台首次上网日期，不代表论文的发表时间）