Research Papers

Cold Metal Transfer Welding of AA6061 to AA7075: Mechanical Properties and Corrosion

[+] Author and Article Information
Nilay Çömez

Engineering Faculty,
Department of Metallurgical and Materials Engineering,
Manisa Celal Bayar University,
45140 Manisa, Turkey
e-mail: nilay.comez@cbu.edu.tr

Hülya Durmuş

Engineering Faculty,
Department of Metallurgical and Materials Engineering,
Manisa Celal Bayar University,
45140 Manisa, Turkey
e-mail: hulya.durmus@cbu.edu.tr

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the Journal of Engineering Materials and Technology. Manuscript received December 8, 2017; final manuscript received February 6, 2019; published online March 11, 2019. Assoc. Editor: Khaled Morsi.

J. Eng. Mater. Technol 141(3), 031002 (Mar 11, 2019) (6 pages) Paper No: MATS-17-1367; doi: 10.1115/1.4042863 History: Received December 08, 2017; Accepted February 06, 2019

Cold metal transfer (CMT) welding provides many advantages for welding of dissimilar materials and thin sheets with its superior heat input control mechanism. In this study, AA6061 and AA7075 aluminum alloys were joined with CMT welding. The effect of welding parameters on hardness, tensile strength, and corrosion rate was investigated. The Tafel extrapolation method was carried out to determine the corrosion rates of AA6061 and AA7075 base metals and AA6061–AA7075 joints. Increasing heat input was found to be detrimental for both mechanical properties and corrosion resistance. The outcomes showed that CMT welding produces adequate joints of AA6061–AA7075 in terms of mechanical properties and corrosion resistance, favorably with welding parameters that provide low heat input.

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Matusiak, J., and Wyciślik, J., 2013, “Analysis of Influence of Material-Technological Conditions of Alternating Polarity MIG Welding of Aluminum Alloys on Welding Fumes Emission,” Biuletyn Instytutu Spawalnictwa, 4, pp. 5–21.
Ishak, M., Noordin, N. F. M., Hakim, L., and Shah, A., 2015, “Feasibility Study on Joining Dissimilar Aluminum Alloys AA6061 and AA7075 by Tungsten Inert Gas (TIG),” J. Teknol. (Sci. Eng.), 75(7), pp. 79–84.
Guo, J. F., Chen, H. C., Sun, C. N., Bi, G., Sun, Z., and Wei, J., 2014, “Friction Stir Welding of Dissimilar Materials Between AA6061 and AA7075 Al Alloys Effects of Process Parameters,” Mater. Des., 56, pp. 185–192. [CrossRef]
Borchers, T. E., Seid, A., Babu, S. S., Shafer, P., and Zhang, W., 2015, “Effect of Filler Metal and Post-Weld Friction Stir Processing on Stress Corrosion Cracking Susceptibility of Al–Zn–Mg Arc Welds,” Sci. Technol. Weld. Joi., 20(6), pp. 460–467. [CrossRef]
Bahemmat, P., Haghpanahi, M., Besharati, M. K., Ahsanizadeh, S., and Rezaei, H., 2010, “Study on Mechanical, Micro-, and Macrostructural Characteristics of Dissimilar Friction Stir Welding of AA6061-T6 and AA7075-T6,” Proc. Inst. Mech. Eng. B-J. Eng., 224(12), pp. 1854–1864. [CrossRef]
Mezrag, B., Deschaux-Beaume, F., and Benachour, M., 2015, “Control of Mass and Heat Transfer for Steel/aluminum Joining Using Cold Metal Transfer Process,” Sci. Technol. Weld. Joi., 20(3), pp. 189–198. [CrossRef]
Ahsan, M. R., Kim, Y. R., Ashiri, R., Cho, Y. J., Jeong, C., and Park, Y. D., 2016, “Cold Metal Transfer (CMT) GMAW of Zinc-Coated Steel,” Weld. J., 95(4), pp. 120–132.
Elrefaey, A., 2015, “Effectiveness of Cold Metal Transfer Process for Welding 7075 Aluminum Alloys,” Sci. Technol. Weld. Joi., 20(4), pp. 280–285. [CrossRef]
Efzan, E., Kovalan, K. V., and Suriati, G., 2012, “A Review of Welding Parameter on Corrosion Behavior of Aluminum,” Int. J. Eng., 1(1), pp. 2305–8269.
Jariyaboon, M., Davenport, A. J., Ambat, R., Connolly, B. J., Williams, S. W., and Price, D. A., 2006, “Corrosion of a Dissimilar Friction Stir Weld Joining Aluminum Alloys AA2024 and AA7010,” Corros. Eng. Sci. Technol., 41(2), pp. 135–142. [CrossRef]
Raguraman, D., Muruganandam, D., and Dhas, L. K., 2014, “Corrosion Study in Friction Stir Welded Plates of AA6061 and AA7075,” Int. J. ChemTech Res., 6(4), pp. 2577–2582.
Srinivasan, P. B., Dietzel, W., Zettler, R., Dos Santos, J. F., and Sivan, V., 2005, “Stress Corrosion Cracking Susceptibility of Friction Stir Welded AA7075–AA6056 Dissimilar Joint,” Mater. Sci. Eng. A, 392(1–2), pp. 292–300. [CrossRef]
Sathish, R., and Rao, V. S., 2014, “Corrosion Studies on Friction Welded Dissimilar Aluminum Alloys of AA7075-T6 and AA6061-T6,” Int. J. Electrochem. Sci., 9, pp. 4104–4113.
Zhang, Y. M., Pan, C., and Male, A. T., 2000, “Improved Microstructure and Properties of 6061 Aluminum Alloy Weldments Using a Double-Sided Arc Welding Process,” Metall. Mater. Trans. A, 31(10), pp. 2537–2543. [CrossRef]
Ambriz, R. R., Froustey, C., and Mesmacque, G., 2013, “Determination of the Tensile Behavior at Middle Strain Rate of AA6061-T6 Aluminum Alloy Welds,” Int. J. Impact. Eng., 60, pp. 107–119. [CrossRef]
Stathers, P. A., Hellier, A. K., Harrison, R. P., Ripley, M. I., and Norrish, J., 2014, “Hardness–Tensile Property Relationships for HAZ in 6061­T651 Aluminum,” Weld. J., 93, pp. 301–311.
Hu, B., and Richardson, I. M., 2007, “Microstructure and Mechanical Properties of AA7075(T6) Hybrid Laser/GMA Welds,” Mater. Sci. Eng. A, 459(1–2), pp. 94–100. [CrossRef]
Bauccio, M., 1993, ASM Metals Reference Book, ASM International, Geauga County, OH, USA, p. 614.
Mutombo, K., and Du Toit, M., 2011, “Corrosion Fatigue Behaviour of Aluminum Alloy 6061-T651 Welded Using Fully Automatic Gas Metal Arc Welding and ER5183 Filler Alloy,” Int. J. Fatigue, 33(12), pp. 1539–1547. [CrossRef]
Xie, W. F., Fan, C. L., and Yang, C. L., 2016, “Pulsed Ultrasonic­Wave­Assisted GMAW of 7A52 Aluminum Alloy,” Weld. J., 95(7), pp. 239–247.
Ravikumar, S., Rao, V. S., and Pranesh, R. V., 2014, “Effect of Process Parameters on Mechanical Properties of Friction Stir Welded Dissimilar Materials Between AA6061-T651 and AA7075-T651 Alloys,” Int. J. Adv. Mech. Eng., 4(1), pp. 101–114.
Rajakumar, S., Muralidharan, C., and Balasubramanian, V., 2011, “Predicting Tensile Strength, Hardness and Corrosion Rate of Friction Stir Welded AA6061-T6 Aluminum Alloy Joints,” Mater. Des., 32(5), pp. 2878–2890. [CrossRef]
El-Menshawy, K., El-Sayed, A. W. A., El-Bedawy, M. E., Ahmed, H. A., and El-Raghy, S. M., 2012, “Effect of Aging Time at Low Aging Temperatures on the Corrosion of Aluminum Alloy 6061,” Corros. Sci., 54, pp. 167–173. [CrossRef]
Venugopal, A., Panda, R., Manwatkar, S., Sreekumar, K., Krishna, L. R., and Sundararajan, G., 2012, “Effect of Micro Arc Oxidation Treatment on Localized Corrosion Behaviour of AA7075 Aluminum Alloy in 3.5% NaCl Solution,” Trans. Nonferrous Met. Soc. China, 22(3), pp. 700–710. [CrossRef]
Andreatta, F., Terryn, H., and De Wit, J. H., 2004, “Corrosion Behaviour of Different Tempers of AA7075 Aluminum Alloy,” Electrochim. Acta, 49(17–18), pp. 2851–2862. [CrossRef]
Fahimpour, V., Sadrnezhaad, S. K., and Karimzadeh, F., 2012, “Corrosion Behavior of Aluminum 6061 Alloy Joined by Friction Stir Welding and Gas Tungsten Arc Welding Methods,” Mater. Des., 39, pp. 329–333. [CrossRef]
Davis, J. R., 1999, Corrosion of Aluminum and Aluminum Alloys, ASM International, Geauga County, OH, p. 313.
Heinz, B., and Skrotzki, B., 2002, “Characterization of a Friction-Stir-Welded Aluminum Alloy 6013,” Metall. Mater. Trans. B, 33(3), pp. 489–498. [CrossRef]
Fleming, K. M., Zhu, A., and Scully, J. R., 2012, “Corrosion of AA6061 Brazed With an Al-Si Alloy: Effects of Si on Metallurgical and Corrosion Behavior,” Corrosion, 68(12), pp. 1126–1145. [CrossRef]
Katsas, S., Nikolaou, J., and Papadimitriou, G., 2007, “Corrosion Resistance of Repair Welded Naval aluminum Alloys,” Mater. Des., 28(3), pp. 831–836. [CrossRef]
Ghali, E., 2010, Corrosion Resistance of Aluminum and Magnesium Alloys: Understanding, Performance, and Testing, John Wiley & Sons, NJ, p. 640.
Martienssen, W., and Warlimont, H., 2006, Springer Handbook of Condensed Matter and Materials Data, Springer, New York, pp. 1121.
Halambek, J., Bubalo, M. C., Redovniković, I. R., and Berković, K., 2014, “Corrosion Behaviour of Aluminum and AA5754 Alloy in 1% Acetic Acid Solution in Presence of Laurel Oil,” Int. J. Electrochem. Sci., 9(10), pp. 5496–5506.
Vargel, C., 2004, Corrosion of Aluminum, Elsevier, Oxford, p. 700.
Trueba, M., and Trasatti, S. P., 2010, “Study of Al Alloy Corrosion in Neutral NaCl by the Pitting Scan Technique,” Mater. Chem. Phys., 121(3), pp. 523–533. [CrossRef]


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Fig. 1

Microstructures of the weld metal: (a) 67-L and (b) 67-H. The proportion of porosity in the weld metal (pores in dark): (c) 67-L and (d) 67-H.

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Fig. 2

AA6061/weld metal interface: (a) 67-L, (b) 67-M, (c) 67-H, and (d) AA6061 base metal

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Fig. 3

AA7075/weld metal interface: (a) 67-L and (b) 67-M

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Fig. 4

Hardness distribution of welded samples

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Fig. 5

(a) Stress–strain curves of AA6061–AA7075 CMT-welded specimens, (b) Heat input–tensile strength relationship, (c) Ruptured samples after tensile testing, and (d) Fracture surface of 67-L

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Fig. 6

Tafel curves of AA6061–AA7075 joints

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Fig. 7

Correlation between the heat input and the corrosion rate

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Fig. 8

Corroded surface of 67-M: (a) AA6061 base metal, (b) weld metal, and (c) EDX analyses from AA6061 base metal

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Fig. 9

EDX analyses of 67-L after corrosion (1: AA7075; 2: intermetallic particle; 3: interdendritic phase)

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Fig. 10

Intergranular corrosion: (a) 67-H and (b) 67-M. Corrosion in weld metal: (c) 67-L and (d) 67-H.



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