Effect of Welding Parameters on the Mechanical and Metallurgical Properties of Friction Stir Spot Welding of Copper Lap Joint
- 27 Downloads
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.
KeywordsPure copper Friction stir spot welding Tensile failure load Metallurgical bonded region Fracture surface morphology
Unable to display preview. Download preview PDF.
- 9.Kulekci, M.; Esme, U.; Er, O.: Experimental comparison of resistance spot welding and friction-stir spot welding processes for the EN AW 5005 aluminum alloy. Mater. Technol. 45(5), 395–399 (2011)Google Scholar
- 12.Sakano, R.; Murakami, K.; Yamashita, K.; Hyoe, T.; Fujimoto, M.; Inuzuka, M.; Nagano, Y.; Kashiki, H.: Development of spot FSW robot system for automobile body members. In: Proceedings of the Third International Symposium of Friction Stir Welding, Kobe, Japan, TWI, 27–28 Sept 2001Google Scholar
- 14.Paidar, M.; Khodabandeh, A.; Sarab, M.; Taheri, M.: Effect of welding parameters (plunge depths of shoulder, pin geometry, and tool rotational speed) on the failure mode and stir zone characteristics of friction stir spot welded aluminum 2024-T3 sheets. J. Mech. Sci. Technol. 29(11), 4639–4644 (2015)CrossRefGoogle Scholar
- 16.Mahgoub, A.; Merah, N.; Bazoune, A.; Al-Badour, F.: Effect of pin tool profile on mechanical and metallurgical properties in friction stir spot welding of pure copper. In: 8th International Conference on Mechanical and Aerospace Engineering, pp. 381–384. IEEE (2017)Google Scholar
- 22.Dinaharan, I.; Akinlabi, E.: Influence of tool rotational speed on the microstructure and joint strength of friction stir spot welded pure copper. Mater. Technol. 50(5), 791–796 (2016)Google Scholar
- 26.AWS/SAE D8.9M:2002: Recommended practices for test methods for evaluating the resistance spot welding behavior of automotive sheet steel materials. American Welding Society (2002)Google Scholar
- 27.A. E8: Standard test methods for tensile testing of metallic materials. Annu. B. ASTM Stand. 3, 1–3 (1997)Google Scholar
- 29.Al-Badour, F.: Numerical and experimental investigations of friction stir welding of tube-tubesheet joints. Ph.D. Dissertation, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia (2012)Google Scholar