Volume 20, Issue 1 (January 2020)
Modares Mechanical Engineering 2020, 20(1): 25-34 |
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Mohammadnia H, Mousavizade S, Ezatpour H. Effect of Tool Rotation Speed and Dwelling Time on Mechanical Properties of Al-Mg Sheets Welded By Protrusion Friction Stir Spot Welding. Modares Mechanical Engineering 2020; 20 (1) :25-34
URL: http://mme.modares.ac.ir/article-15-30464-en.html
URL: http://mme.modares.ac.ir/article-15-30464-en.html
1- Mechanical Engineering Department, Engineering Faculty, Dezfool University, Dezfool, Iran
2- 2Material Science Engineering Department, Engineering Faculty, University of Gonabad, Gonabad, Iran
3- Engineering Science Department, Engineering Faculty, Sabzevar University of New Technology, Sabzevar, Iran , h.r.ezatpour@gmail.com
2- 2Material Science Engineering Department, Engineering Faculty, University of Gonabad, Gonabad, Iran
3- Engineering Science Department, Engineering Faculty, Sabzevar University of New Technology, Sabzevar, Iran , h.r.ezatpour@gmail.com
Abstract: (4464 Views)
In this research, the effect of tool rotation speed and dwelling time on the strength of the welds produced by protrusion friction stir spot welding (PFSSW) was investigated. This simple novel technique involves the use of a designed circular protrusion on the backing anvil. Welding was performed by pinless tools on the AA5053 sheets with a thickness of 1 mm at tool rotation speeds of 630-2000 rpm and dwelling times of 6 s, 12 s, and 18 s. Appearance surface of produced welds was the smooth and free keyhole in comparison with conventional friction stir spot welding. Tensile-shear test results showed that all welds were failed in circumferential failure mode. Maximum and minimum peak loads were obtained at 1600 rpm, 18 s (4.9 kN) and 1000 rpm, 12 s (3.5 kN), respectively. Maximum and minimum elongations were obtained at 2000 rpm, 18 s (5 mm) and 2000 rpm, 6 s (2.3 mm), respectively. Maximum and minimum failure energies were obtained at 2000 rpm, 18 s (12.3 J) and 1000 rpm, 12 s (3.1 J), respectively.
Keywords: AA5053, Protrusion Friction Stir Spot Welding, Tool Rotational Speed, Tool Dwelling Time, Mechanical Properties
Article Type: Original Research |
Subject:
Welding
Received: 2019/02/14 | Accepted: 2019/04/24 | Published: 2020/01/20
Received: 2019/02/14 | Accepted: 2019/04/24 | Published: 2020/01/20
References
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