Investigation on constitutive equations for TA15 during hot working
Hot compression tests were conducted on Gleeble-1500 thermal simulator for TA15titanium alloy at temperatures of 750~1050 ℃ and at strain rate of 0.001 ~ 1 s with a deformation reduction of 60%.The results show that the flow stress of TA15 titanium alloy increases rapidly to a peak with deformation strain,then decreases to a saturation status.The steady and peak stress significantly decreases with deformation temperature increasing and strain rate decreasing.The activation energies (Q) are 619.264kJ/mol in (α+β) phase and 522.58kJ/mol in β phase,respectively.It was found that the parameters,peak stress σp,steady stress ores,peak strain εp and steady strain ares,have linear relationships with Zenner-Hollomon parameter,Z.
TA15 alloy hot compression activation energy (Q) constitutive equation
Yanshu Zhang Yan Sun
No.18 Xue Qing Road, Haidian District, 100083 Beijing, P.R.China
国际会议
香港
英文
1492-1496
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）