Effect of friction stir welding parameters on the ultimate tensile strength of Al-Cu tailor welded blanks

Document Type: Research Paper

Authors

1 Department of Mechanical Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Khoozestan, Iran

2 National Iranian Oil Company, Oil & Amp;Gas Production South Company, Gachsaran, Iran

Abstract

In the present study, parameters of tool rotation speed, tool travel speed and tool offsetting with different levels were used in the friction stir welding (FSW) of aluminum-copper tailor welded blanks (TWBs). The FSW of pure copper to 5052 aluminum alloy were carried out by varying tool rotation speed from 800 rpm to 1200 rpm, tool travel speed from 40 mm/min to 80 mm/min and tool offsetting from 1 mm to 2 mm. The L9 orthogonal array of Taguchi was used to design 9 experimental tests and each test was repeated three times. The uniaxial tensile test based on the ASTM-E8 was used for mechanical properties extraction of TWBs. The tool rotation speed of 1200 rpm, tool travel speed of 60 mm/min and tool offsetting of 1.5 mm resulted in the optimum range of heat input to form a stir zone with good quality. Using these FSW parameters caused the formation of thin intermetallic layers which stopped the motion of dislocation in the tensile test and resulted in higher tensile strength and joint quality. The scanning electron microscope (SEM) was used to scan the tensile fracture surface of TWBs.

Keywords


[1] S. Malarvizhi, V. Balasubramanian, Influences of tool shoulder diameter to plate thickness ratio (D/T) on stir zone formation and tensile properties of friction stir welded dissimilar joints of AA6061 aluminum–AZ31B magnesium alloys, Materials & Design 40 (2012) 453-460.
[2] T. Watanabe, H. Takayama, A. Yanagisawa, Joining of aluminum alloy to steel by friction stir welding, Journal of Materials Processing Technology 178(1) (2006) 342-349.
[3] M. Parente, R. Safdarian, A. Santos, A. Loureiro, P. Vilaca, R.M.N. Jorge, A study on the formability of aluminum tailor welded blanks produced by friction stir welding, Int J Adv Manuf Technol (2015) 1-13.
[4] R. Safdarian Korouyeh, H.M. Naeini, M.J. Torkamany, J. Sabaghzadee, Effect of Laser Welding Parameters on Forming Behavior of Tailor Welded Blanks, Advanced Materials Research 445 (2012) 406-411.
[5] R.S. Korouyeh, H.M. Naeini, G.H. Liaghat, M.M. Kasaei, Investigation of weld line movement in tailor welded blank forming, Advanced Materials Research 445 (2012) 39-44.
[6] M.M. Attallah, H.G. Salem, Friction stir welding parameters: a tool for controlling abnormal grain growth during subsequent heat treatment, Materials Science and Engineering: A 391(1) (2005) 51-59.
[7] M.F.X. Muthu, V. Jayabalan, Tool travel speed effects on the microstructure of friction stir welded aluminum–copper joints, Journal of Materials Processing Technology 217 (2015) 105-113.
[8] R. Safdarian, Investigation of Influence of Friction Stir Welding Parameters on Formability of Aluminum Tailor Welded Blanks, Amirkabir Journal of Mechanical Engineering 48(2) (2016) 207-214.
[9] C. Genevois, M. Girard, B. Huneau, X. Sauvage, G. Racineux, Interfacial Reaction during Friction Stir Welding of Al and Cu, Metallurgical and Materials Transactions A 42(8) (2011) 2290.
[10] P. Xue, D.R. Ni, D. Wang, B.L. Xiao, Z.Y. Ma, Effect of friction stir welding parameters on the microstructure and mechanical properties of the dissimilar Al–Cu joints, Materials Science and Engineering: A 528(13) (2011) 4683-4689.
[11] V.C. Sinha, S. Kundu, S. Chatterjee, Microstructure and mechanical properties of similar and dissimilar joints of aluminium alloy and pure copper by friction stir welding, Perspectives in Science 8 (2016) 543-546.
[12] Q.Z. Zhang, W.B. Gong, W. Liu, Microstructure and mechanical properties of dissimilar Al–Cu joints by friction stir welding, Transactions of Nonferrous Metals Society of China 25(6) (2015) 1779-1786.
[13] M. Dhondt, I. Aubert, N. Saintier, J.M. Olive, Characterization of intergranular stress corrosion cracking behavior of a FSW Al-Cu-Li 2050 nugget, Mechanics & Industry 16(4) (2015) 401.
[14] F. Kordestani, F.A. Ghasemi, N.B. Mostafa Arab, An investigation of FSW process parameters effects on mechanical properties of PP composites, Mechanics & Industry 17(6) (2016) 611.
[15] A. Abdollah-Zadeh, T. Saeid, B. Sazgari, Microstructural and mechanical properties of friction stir welded aluminum/copper lap joints, Journal of Alloys and Compounds 460(1–2) (2008) 535-538.
[16] I. Galvão, J.C. Oliveira, A. Loureiro, D.M. Rodrigues, Formation and distribution of brittle structures in friction stir welding of aluminium and copper: Influence of shoulder geometry, Intermetallics 22 (2012) 122-128.
[17] A. Heidarzadeh, T. Saeid, Prediction of mechanical properties in friction stir welds of pure copper, Materials & Design (1980-2015) 52 (2013) 1077-1087.
[18] X.W. Li, D.T. Zhang, C. Qiu, W. Zhang, Microstructure and mechanical properties of dissimilar pure copper/1350 aluminum alloy butt joints by friction stir welding, Transactions of Nonferrous Metals Society of China 22(6) (2012) 1298-1306.
[19] I. Galvão, J.C. Oliveira, A. Loureiro, D.M. Rodrigues, Formation and distribution of brittle structures in friction stir welding of aluminium and copper: influence of process parameters, Science and Technology of Welding and Joining 16(8) (2011) 681-689.
[20] A.S.f.T.a.M. (ASTM), Metals Test Methods and Analytical Procedures, (1999) 78–98, 501–508.
[21] S. Celik, R. Cakir, Effect of Friction Stir Welding Parameters on the Mechanical and Microstructure Properties of the Al-Cu Butt Joint, Metals 6(6) (2016) 133.
[22] R. Moshwan, F. Yusof, M.A. Hassan, S.M. Rahmat, Effect of tool rotational speed on force generation, microstructure and mechanical properties of friction stir welded Al–Mg–Cr–Mn (AA 5052-O) alloy, Materials & Design (1980-2015) 66 (2015) 118-128.
[23] R. Borrisutthekul, T. Yachi, Y. Miyashita, Y. Mutoh, Suppression of intermetallic reaction layer formation by controlling heat flow in dissimilar joining of steel and aluminum alloy, Materials Science and Engineering: A 467(1) (2007) 108-113.
[24] N. Yamamoto, J. Liao, S. Watanabe, K. Nakata, Effect of Intermetallic Compound Layer on Tensile Strength of Dissimilar Friction-Stir Weld of a High Strength Mg Alloy and Al Alloy, Materials Transactions 50(12) (2009) 2833-2838.