Microstructural and mechanical properties of welded SSM356-T6 and SSM7075-T6 aluminum semi-solid sheets by friction stir welding

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Published: Oct 26, 2016
Keywords:
Friction stir welding Dissimilar joined Aluminum alloy Semi-solid

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Worapong Boonchouytan
Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya
Jaknarin Chatthong
Prapas Muangjunburee

Abstract

Friction stir welding (FSW) is a welding process applied in this research to join different grades of alloy sheets consisting of semi-solid metal (SSM) 356-T6 and 7075-T6. The test pieces had dimensions of 50 mm × 100 mm × 4 mm. The effect of the tool rotational speed on metallurgy, and mechanical properties of the weld was investigated. Dissimilar butt joints were produced using a cylindrical pin with different tool rotation (710, 1,000 and 1,400 rpm) and welding speeds (80, 112 and 160 mm/min). The weld microstructures showed three different areas including a base metal, stir zone and thermo mechanical affected zone, which were directly affected by the rotation speed of the tool. A butt joint rotation speed of 1,000 rpm provided an average maximum tensile strength of 246.33 MPa. This rotational speed allowed material to flow from the front to the rear of the tool. The heat generated from friction lead to microstructural changes and promoted good mixing and adhesion of both materials.

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How to Cite
Boonchouytan, W., Chatthong, J., & Muangjunburee, P. (2016). Microstructural and mechanical properties of welded SSM356-T6 and SSM7075-T6 aluminum semi-solid sheets by friction stir welding. Engineering and Applied Science Research, 43(4), 189–195. Retrieved from https://ph01.tci-thaijo.org/index.php/easr/article/view/47861
Issue
Vol. 43 No. 4 (2016)
Section
ORIGINAL RESEARCH

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