Flow Softening Behavior during Hot Deformation Processes of 7005 Aluminum Alloy at Medium Strain Rate
During the hot deformation of 7005 aluminum at medium strain rate of 50s-1,the flow stress curves exhibit continuous flow softening.After the correction for deformation heating,the flow softening still exists at high temperatures.EBSD observations indicate that the remaining softening is associated with grain boundary migration during dynamic recovery process.The flow softening of dynamic grain boundary migration (DGBM) and deformation heating both were removed from the flow stress curves.After ignoring those two flow softening mechanisms,the flow stress curves reach steady state values after its peak value at all deformation temperatures,which are similar with the shape of typical dynamic recovery flow stress curves.It is conclude that in addition to dynamic recovery the deformation heating and DGBM are dominated flow softening mechanisms for 7005 aluminum alloy during hot deformation.
7005 Aluminum Alloy High-Temperature Deformation Flow Softening Deformation Heating Grain Boundary Migration
Luoxing Li Guan Wang Shikang Li
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410082,Hunan,China;College of Mechanical and vehicle Engineering,Hunan University,Changsha,410082,Hunan,China
国际会议
沈阳
英文
1026-1031
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）