Prediction and Measurements of Thermal Residual Stresses in AA2024-T3 Friction Stir Welds as a Function of Welding Parameters

Abstract

Prediction and measurements of thermal residual stresses in AA2024-T3 friction stir welds as a function of welding parameters Dubourg, L.; Doran, P.; Larose, S.; Gharghouri, M. A.; Jahazi, M.

Experimental and theoretical evaluations of thermal histories and residual stresses in dissimilar friction stir welding of AA5086-AA6061

“…In their research, prior to welding, the samples were mechanically loaded to about 70% of the tensile yield strength in an in situ loading apparatus and it is observed that the imposed mechanical loading leads to large compressive residual stresses after welding. Dubourg et al [6] have investigated the effect of welding parameters on thermal residual stress in friction stir welding of AA2024 using a three-dimensional model. Yujie et al [7] have studied the residual stress distribution and effect of postweld cold rolling process on residual stress of friction stir welded aluminum alloy.…”

Laser ultrasonics for defect detection and residual stress measurement of friction stir welds

“…In the case of strain gauge measurements however, the cross point from tensile to compressive stress is at a position of about 20 mm, different than that of the calculation and laser ultrasonics. Recent results from the neutron diffraction technique showed that the cross point is closer to that of laser ultrasonics [23]. …”

Numerical analysis of the dwell phase in friction stir welding and comparison with experimental data

“…The thermal cycles are used to predict residual stresses [6][7][8] or metallurgical features such as the precipitation state in the material [9,10]. They can be computed analytically by using Rosenthal's equation [11] for a moving single-point heat source, or numerically by using the finite difference method or the finite element method (FEM).…”