EFFECT OF ELECTRIC CURRENT PULSE ON SUPERPLASTICITY OF ALUMINIUM ALLOY 7475

来源期刊：中国有色金属学报(英文版)1996年第1期

论文作者：Li Yao Chen Hong Gu Yunqou Hu Xinbin

文章页码：77 - 79

Key words：aluminium alloy 7475 ; superplasticity ; electric ; current pulse

Abstract: The superplastic deformation of aluminium alloy 7475 applied electric current pulse has been studied. The results presented chat applying a high density current pulse raises hoth the elongation rate and Ehe m value .and makes supperior superplastic properties at high strain rate of 10^-2s^-1，the op-timum deformation temperature could move from 530 ℃ to 480---510 ℃，TEM observation showed thesuperplastic deformation of the alloy is the results of grain boundary slips and dislocation slips in grains under funetion of the electron wind; the intergranular tear is a main behavior of fracture of the alloy.