A study on the hot deformability of 2519 aluminum alloy at elevated temperature
The hot-deformability of 2519 aluminum alloy under elevated temperature is studied by the analysis of stress-strain curve and the observation of the deformed microstructures with an optical microscope (OM) and a transmission electron microscope (TEM). Compression tests were performed on Gleeble-1500 thermal simulator at the deformation temperature range from 300℃ to 500℃ and at the strain rate range 0.05S-1 to 25S-1. The experimental results show that the flow stress of 2519 aluminum alloy increases with increasing strain and tends to be constant after a peak value at lower strain rates ( ), and a dynamic recovered substructure is observed with TEM. The flow stress sawtooth fluctuates and decreases after a peak value with the increasing strain at higher strain rates( ), which is associated with a dynamic recrystallization revealed by OM and TEM. The flow softening is due to dynamic precipitate coalescence and not to dynamic recrystallization at elevated temperature and the lower strain rate.
2519 aluminum alloy hot deformation flow stress dynamic recover dynamic recrystallization dynamic precipitation
Qiquan LIN Dashu PENG Yingming LI Gaoyong LIN
School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, P.R.China;School of Material School of Materials Science and Engineering, Central South University, Changsha, 410083, P.R.China School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, P.R.China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）