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Effect of Welding Parameters on the Mechanical and Metallurgical Properties of Friction Stir Spot Welding of Copper Lap Joint

  • Ahmed Mahgoub
  • Abdelaziz Bazoune
  • Neçar Merah
  • Fadi Al-Badour
  • Adelrahman Shuaib
Research Article - Mechanical Engineering
  • 2 Downloads

Abstract

In this work, 2-mm-thick pure copper plates are joined using friction stir spot welding (FSSW) at different rotational speeds, plunging rates and dwell times. Effects of these process parameters on the quality of the weldments, bonding region and shear–tensile failure load of the joints are studied. A maximum shear–tensile failure load of 5.5 kN was obtained at 1200 rpm rotational speed, 20 mm/min plunging rate and 2-s dwell time. Interestingly, this set of welding conditions also resulted in end of partial metallurgical bonded region along the interface that is free of voids and cracks which indicates strong weldments. Fracture surface morphology was also investigated, and ductile fracture mode was observed for 1200 rpm, 20 mm/min and 2 s which showed high elongation before complete fracture. Moreover, mechanical energy consumed during welding was estimated for each set of welding conditions under study and was found significantly affecting shear tensile failure load of the welds.

Keywords

Pure copper Friction stir spot welding Tensile failure load Metallurgical bonded region Fracture surface morphology 

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.Engineering Technology Program, PSEPKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia
  2. 2.Mechanical Engineering DepartmentKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia
  3. 3.Mechanical Engineering, School for Engineering of Matter, Transport and EnergyArizona State UniversityTempeUSA

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