Studying the Possibility to Weld AA1100 Aluminum Alloy by Friction Stir Spot Welding

Authors: Ahmad K. Jassim, Raheem Kh. Al-Subar

Abstract:

Friction stir welding is a modern and an environmentally friendly solid state joining process used to joint relatively lighter family of materials. Recently, friction stir spot welding has been used instead of resistance spot welding which has received considerable attention from the automotive industry. It is environmentally friendly process that eliminated heat and pollution. In this research, friction stir spot welding has been used to study the possibility to weld AA1100 aluminum alloy sheet with 3 mm thickness by overlapping the edges of sheet as lap joint. The process was done using a drilling machine instead of milling machine. Different tool rotational speeds of 760, 1065, 1445, and 2000 RPM have been applied with manual and automatic compression to study their effect on the quality of welded joints. Heat generation, pressure applied, and depth of tool penetration have been measured during the welding process. The result shows that there is a possibility to weld AA1100 sheets; however, there is some surface defect that happened due to insufficient condition of welding. Moreover, the relationship between rotational speed, pressure, heat generation and tool depth penetration was created.

Keywords: Friction, spot, stir, environmental, sustainable, AA1100 aluminum alloy.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132443

References:

[1] P. Briskham, N. Blundell, L. Han, R. Hewitt, K. Young and D. Boomer, “Comparison of self-pierce riveting, resistance spot welding and spot friction joining for aluminium automotive sheet.” SAE Technical Paper, 2006- 01-0774, 2006.
[2] Kallee, S.W. and Mistry, A., “Friction Stir Welding in the Automotive Body-in-White Production”, 1st International Symposium on Friction Stir Welding, California, June 1999.
[3] Mustafa Kemal Kulekci, Ugur Esme, Onur Er, “Experimental Comparison of Resistance Spot Welding and Friction-Stir Spot Welding Processes for the EN AW 5005 Aluminum Alloy”, Materials and technology, p395-399, 2011.
[4] Pan T Y, “Friction Stir Spot Welding (FSSW) - A Literature Review.”, SAE technical paper series 2007-01-1702.
[5] Feng, Z., M.L. Santella, S.A. David, R.J. Steel, S.M. Packer, T. Pan, M. Kuo and R.S. Bhatnagar, “Friction Stir Spot Welding of Advanced High-Strength Steels-a Feasibility Study.”, SAE Technical Paper, 2005.
[6] Y. Tozaki, Y. Uematsu, and K. Tokaji, “A newly developed tool without probe for friction stir spot welding and its performance.” Journal of Materials Processing Technology, vol. 210, no.6-7, pp. 844–851, 2010.
[7] X.W. Yang, T. Fu, W.Y. Li, “Friction stir spot welding: a review on joint macro-and microstructure, property, and process modelling.”, Advances in Materials Science and Engineering 697170 (2014) 1–11 2014 Article ID.
[8] Tran V. X., J. Pan, T. Pan, “Effects of processing time on strengths and failure modes of dissimilar spot friction welds between aluminum 5754-O and 7075-T6 sheets.”, J. Mat. Proc. Tec., 209, 3724-3739, 2009.
[9] Badarinarayan H., Q. Yang, S. Zhu, “Effect of tool geometry on static strength of friction stir spot welded aluminum alloy”, Int. J. Mac. Tec. Man., 49, 142-148,2009
[10] R.S. Mishra and Z.Y. Ma, "Friction Stir Welding and Processing", Materials Science and Engineering R, Vol. 50, pp. 1-78, August 2005.
[11] Yuan, Wei, "Friction stir spot welding of aluminum alloys" (2008). Masters Theses. 5429. http://scholarsmine.mst.edu/masters_theses/5429
[12] Y. Sun, H. Fujii, N. Takaki and Y. Okitsu, "Microstructures and mechanical properties of mild steel joints prepared by a flat friction stir spot welding technique", Materials & Design, Vol. 37, pp. 384-392, 2012.
[13] Uematsu Y., Tokaji K., Tozaki Y., Kurita T., Murata S. “Effect of refilling probe hole on tensile failure and fatigue behaviour of friction stir spot welded joints in Al–Mg–Si alloy” International Journal of Fatigue 30 (2008) 1956–1966.
[14] Mohamed Merzoug, Mohamed Mazari, Lahcene Berrahal, Abdellatif Imad “Parametric studies of the process of friction spot stir welding of aluminium 6060-T5 alloys” Materials and Design 31 (2010) 3023 -3028.
[15] Zhaohua Zhang, Xinqi Yang, Jialong Zhang, Guang Zhou, Xiaodong Xu, Binlian Zou “Effect of welding parameters on microstructure and mechanical properties of friction stir spot welded 5052 aluminum alloy” Materials and Design 32 (2011) 4461–4470
[16] Zhikang Shen, Xinqi Yang, Zhaohua Zhang, Lei Cui, Yuhuan Yin “Mechanical properties and failure mechanisms of friction stir spot welds of AA 6061-T4 sheets” Materials and Design 49 (2013) 181–191.
[17] Yuan W., R.S. Mishra, S. Webb, Y.L. Chen, B. Carlson, D.R. Herling, G.J. Grant, “Effect of tool design and process parameters on properties of Al alloy 6016 friction stir spot welds” Journal of Materials Processing Technology 211 (2011) 972–9
[18] ASM international, Typical Mechanical Properties of Wrought Aluminum Alloys at Various Temperatures, Materials Park, Ohio, USA, www.asminternational.org
[19] American Welding Society,"Resistance Welding Theory and Use", Reinhold Publishing Corporation New York, Chapman & Hall, LTD ,1956.