Abstract
ABSTRACTThe longitudinal residual stresses in the friction stir-welded plates of 5A06 aluminium and pure copper were determined using the contour method. The results revealed the presence of high tensile and compressive residual stresses on the aluminium and copper sides, respectively. The residual stresses were detected on the weld zone as well as the thermo-mechanically affected zone (TMAZ) of the aluminium plate. In contrast, the compressive residual stresses in the copper plate had a much narrower width along the weld line. Peak tensile stresses up to 240 MPa were found in the TMAZ of the aluminium plate.
Highlights
Combination of the excellent thermal and electrical properties of pure copper with the light weight and low cost of aluminium alloys has always been of great interest in power generation, aerospace, automotive and electronics industries [1]
Most of previous academic and industrial investigations were aimed at optimising the Friction stir welding (FSW) process parameters, improving microstructures, reducing defects and enhancing mechanical properties of friction stir-welded Al and Cu plates
It is evident that the magnitude and distribution of residual stresses are significantly different on the aluminium and copper sides
Summary
Combination of the excellent thermal and electrical properties of pure copper with the light weight and low cost of aluminium alloys has always been of great interest in power generation, aerospace, automotive and electronics industries [1]. KEYWORDS Friction stir welding; contour method; residual stress; aluminium copper joints Carlone and Palazzo [24] measured the tensile residual stresses in the weld line of a friction stir-welded AA2024-T3 butt joint using the contour method.
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