THE INFLUENCES OF SEMI-SPHERICAL PIN ON FRICTION STIR WELDING FOR DISSIMILAR MATERIAL | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 2, Volume 47, No 2, March and April 2019, Page 148-156 PDF (732.27 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2019.115117 | ||||
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| Authors | ||||
| Mohamed M.A. Elkhawildi1; Ahmed R. S. Essa2; Abobker M.O. Helmy1; Ramadan I. Elsoeudy1 | ||||
| 1Mechanical Eng. Depart, faculty of engineering, Suez Canal University, Egypt | ||||
| 2Mechanical Department, faculty of industrial Education, Suez, University, Egypt. | ||||
| Abstract | ||||
| The effects of semi-spherical pin on mechanical properties and microstructure of 7 mm thick friction stir welded dissimilar aluminum alloys AA7075 and AA5083 were investigated. Threee different pin profiles were used to weld three joints of dissimilar AA7075 and AA5083 Al alloys. Semi-spherical pin, cylindrical pin, and pin with round groove. The friction stir welding was performed at 700 rpm rotational speed and 25 mm/min welding speed. Defect-free FSW joint was obtained by using a simple tool with semi-spherical pin. Meanwhile, the crack-like defect is formed in the joints produced by the tools with cylindrical pin, and pin with round groove. The usage of FSW tool with semi-spherical pin (large frictional area of pin) produces a friction stir weld joint with higher tensile strength. When the tool with semi-spherical pin is applied, the grains size was smaller than that when using the other tools. | ||||
| Keywords | ||||
| Semi-spherical pin; round groove; mechanical properties; frictional area | ||||
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