Abstract
In this paper, using the ultrasonic method, the residual stress due to friction stir welding of two different metals aluminum 5754 and copper is investigated. Furthermore, the effects of changing the rotational speed and speed of movement along the welding path on residual stress are presented. For this purpose, some experimental tests are considered. The results show that the residual stress in the pin area is higher than stress in other zones of the weld which is due to the pressure applied by the pin to the parts. Furthermore, based on the presented results, decreasing the speed of movement along the welding path and increasing the rotational speed increase the residual stress in sheets. The results also indicate that the residual stress in aluminum is greater than the residual stress in the copper sheet since the thermal conductivity of the aluminum is smaller and the stiffness of the aluminum is greater than those corresponding to copper. The results show that the ultrasonic method can be used to specify the residual stress in friction stir welding of two different materials. To ensure the quality of the welding, the optical microscopy image of a cross-section from the HAZ zone is presented.
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17 September 2021
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Valizadeh, A., Montazerolghaem, H. & Fesharaki, J.J. Detection of residual stress in friction stir welding of heterogeneous aluminum/copper sheets—ultrasonic method. Int J Adv Manuf Technol 117, 97–108 (2021). https://doi.org/10.1007/s00170-021-07746-4
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DOI: https://doi.org/10.1007/s00170-021-07746-4