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《Journal of Harbin University of Science and Technology》 2013-01
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The Influence of Welded Toe TIG Dressing To the Residual Stress of 7075 Aluminum Alloy

XU Zhi-an(Materials Engineering Department,Bohai Shipping Vocational College,Huludao 125000,China)  
In order to research the influence of welded toe TIG dressing process on 7075 aluminum alloy T-joint,we use ABAQUS finite element method to establish physical model and analyse the residual stress distribution of welded toe.The residual stresses of welded toe were also measured by using the blind-hole method.The results indicate that after TIG dressing,the longitudinal residual stresses in welded toe of steel joint are gradually transited from tensile residual stresses to compressive ones,and there is no significant change for transverse residual stresses.The TIG dressing treatment can not only improve the residual stress distribution,but also make the surface of welded toe transferred smoothly,which is useful for the increase of fatigue strength.
【CateGory Index】: TG441.7
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