Flow stress of 2197 Al-Li alloy during hot compression deformation

摘要：

The flow stress behavior of 2197 Al-Li alloy during hot compression deformation was studied in the strain rate range from 0.01 to 10s-1 and the temperature range from 360 to 510 ℃ by isothermal compression test on a Gleeble-1500 thermal-mechanical simulator.The results show that the flow stress of 2197 Al-Li alloy decreases with the increase of deformation temperature and increases with the increase of strain rate.The peak flow stress during high temperature deformation can be represented by Z parameter in a hyperbolic sine function.The analytical expression of peak flow stress was fitted with the hot deformation activation energy of 260.6 kJ/mol.

关键词： 2197 Al-Li alloy hot compression deformation flow stress Z parameter

作者: WEI Xiu-yu ZHENG Zi-qiao FU Xin CHEN Qiu-ni

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）