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transverse-residual-stress
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Experimental investigation into the effects of weld sequence and fixture on residual stresses in Arc welding process
, Article Journal of Materials Engineering and Performance ; Volume 21, Issue 6 , June , 2012 , Pages 892-899 ; 10599495 (ISSN) ; Serajzadeh, S ; Sharif University of Technology
2012
Abstract
This study concentrates on the effects of weld sequence and welding fixtures on distribution and magnitude of induced arc welding residual stresses built up in butt-joint of Gas Tungsten Arc Welding (GTAW) AA5251 plates. Aluminum plates have been welded under different welding conditions and then, longitudinal and transverse residual stresses were measured in different points of the welded plates employing hole-drilling technique. The results indicate that welding sequence significantly alters the distributions of both longitudinal and transverse residual stresses while the changing in the weld sequence leads to 44% decrease in longitudinal residual stress. Besides, both the geometry of weld...
Experimental and theoretical evaluations of thermal histories and residual stresses in dissimilar friction stir welding of AA5086-AA6061
, Article International Journal of Advanced Manufacturing Technology ; Volume 61, Issue 1-4 , 2012 , Pages 149-160 ; 02683768 (ISSN) ; Serajzadeh, S ; Kokabi, A. H ; Sharif University of Technology
2012
Abstract
In this work, the thermomechanical responses during the dissimilar friction stir welding of aluminum alloys have been evaluated employing a three-dimensional model and the finite element software ABAQUS. Furthermore, welding experiments have been conducted under different working conditions and the temperature variations during and after welding as well as the produced residual stresses in various positions of the welded samples were measured using hole-drilling technique. The model results were then examined by experimental data, and a reasonable agreement was observed. It is found that tool rotational speed significantly affects the amount of maximum tensile residual stress while traverse...