Study of Dual Pre-stress Method on Controlling Welding Deflection Deformation of Aluminum Alloy Thin Plate
The development of a new method which control welding distortion and hot crack, the dual pre-stress method, and its application to LY12 (2024Al) are described. This method supply the elimination of side-effects for the conventional single-pre-tensile stress that causes hot–crack during welding, especially at the starting of the welding. In testing, the contribution for controlling welding reflection distortion by transverse pre-stress of dual pre-stress was found. The numerical simulation concentrated on the maximum residual stress in comparison between regular welding and in dual pre-stress welding occasions. The results shows that the welding deflection distortion decreased gradually with the pre-stress value increasing. For given pre-stress value of 0.3σs,0.5σs,0.7σs in longitudinal direction (σs is yield stress of aluminum，320MPa ) and 0.5σs(longitudinal)+0.1σs(transverse), the maximum deflection magnitude were 9mm,5mm,1mm respectively.
dual pre-stress deflection deformation numerical simulation tensile strain
Zhou Guangtao Liu Xuesong Fang Hongyuan
State Key Laboratory of Advanced Welding Technology Production, Harbin Institute of Technology, Harbin 150001
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）