Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Influence of the Welding Speeds and Changing the Tool Pin Profiles on the Friction Stir Welded AA5083-O Joints

  • El-Sayed, M.M. (Mechanical Design and Production Engineering Dept., Faculty of Engineering, Cairo University) ;
  • Shash, A.Y. ;
  • Abd Rabou, M. (Mechanical Design and Production Engineering Dept., Faculty of Engineering, Cairo University)
  • Received : 2016.12.04
  • Accepted : 2017.03.21
  • Published : 2017.06.30
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Abstract

In the present study, AA 5083-O plates are joined by friction stir welding technique. A universal milling machine was used to perform the welding process of the work-pieces which were fixed on the proper position by a vice. The joints were friction stir welded by two tools with different pin profiles; cylindrical threaded pin and tapered smooth one at different rotational speed values; 400 rpm and 630 rpm, and different welding speed values; 100 mm/min and 160 mm/min. During FSW of each joint, the temperature was measured by infra-red thermal image camera. The welded joints were inspected by visually as well as by the macro- and microstructure evolutions. Furthermore, the joints were tested for measuring the hardness and the tensile strength to study the effect of changing the FSW parameters on the mechanical properties. The results show that increasing the rotational speed results in increasing the peak temperature, while increasing the welding speed results in decreasing the peak temperature for the same tool pin profile. Defect free welds were obtained at lower rotational speed by the threaded tool profile. Moreover, the threaded tool pin profile gives superior mechanical properties at lower rotational speed.

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