Abstract
Aluminum alloys of grade 6xxx and 5xxx are used where strength and corrosion resistance both are important. This paper reports the GMA welding of dissimilar 6061 T6 and 5083 O aluminum alloys and comparison of mechanical properties and fracture behavior of dissimilar joints (6061 T6-5083 O) with similar joints of the two base materials (6061 T6-6061 T6 and 5083 O-5083 O). GMA welding is used mostly due to high deposition rate, deeper penetration and high welding speed. The fusion welding of dissimilar aluminum alloys faces many problems due to the different chemical compositions and thermal conductivities of aluminum alloys. The dissimilar joint exhibited an average tensile strength of 138 MPa and weld hardness of 74.2 VHN. The scanning electron micrograph of tensile fracture surface was obtained to investigate the mode of failure. The fractograph at top portion of the fractured surface of 6061 T6-6061 T6 joints exhibited smaller grain size and smaller spacing between grains. The fractograph at middle portion showed population of dimples, which is the indication of ductile type of fracture. The fractograph at bottom portion (root region) indicated relatively smaller cleavage facets in similar joint of 5083 O-5083 O.
Similar content being viewed by others
References
J.M. Kuk, K.C. Jang, D.G. Lee, I.S. Kim, Effect of temperature and shielding gas mixture on fatigue life of 5083 aluminium alloy. J. Mater. Process. Technol. 155–156, 1408–1414 (2004)
T. Senthil Kumar, V. Balasubramanian, M.Y. Sanavullah, Influences of pulsed current tungsten inert gas welding parameters on the tensile properties of AA 6061 aluminium alloy. Mater. Des. 28, 2080–2092 (2007)
S. Malarvizhi, V. Balasubramanian, Effect of welding processes on AA2219 aluminium alloy joint properties. Trans. Nonferrous Met. Soc. China 21, 962–973 (2011)
J.E.R. Dhas, S. Kumanan, Optimization of parameters of submerged arc weld using non-conventional techniques. Appl. Soft Comput. 11, 5198–5204 (2011)
T. Luijendijk, Welding of dissimilar aluminium alloys. J. Mater. Process. Technol. 10, 29–35 (2000)
V. Balasubramanian, V. Ravisankar, G. Madhusudhan, Reddy, effect of pulsed current welding on fatigue behavior of high strength aluminium alloy joints. Mater. Des. 29, 492–500 (2008)
Huang. Ji-wu, Yin. Zhi-min, Lei. Xue-feng, Microstructure and properties of 7A52 Al alloy welded joint. Trans. Nonferrous Met. Soc. China 18, 804–808 (2008)
R.R. Ambriz, G. Barrera, R. Garcia, V.H. Lopez, A comparative study of the mechanical properties of 6061-T6 GMA welds obtained by the indirect electric arc (IEA) and the modified indirect electric arc (MIEA). Mater. Des. 30, 2446–2453 (2009)
R.R. Ambriz, G. Mesmacque, A. Ruiz, A. Amrouche, V.H. Lopez, Effect of welding profile generated by the modified indirect electric arc technique on the fatigue behavior of 6061-T6 aluminium alloy. Mate. Sci. Eng. A 527, 2057–2064 (2010)
R.P Verma, K.N. Pandey, Y. Sharma, Effect of ER4043 and ER5356 filler wire on mechanical properties and microstructure of dissimilar aluminium alloys, 5083-O and 6061-T6 joint, welded by the metal inert gas welding. Proc. Inst. Mech. Eng. B J. Eng. Manuf. 229(6), 1021–1028 (2015)
Bai. Yan, Gao. Hong-ming, W U Lin, MA Zhao-hui, CAO Neng, Influence of plasma-MIG welding parameters on aluminium weld porosity by orthogonal test. Trans. Nonferrous Met. Soc. China 20, 1392–1396 (2010)
S.E. Stanzn-Tschegg, O. Plasser, E.K. Tschegg, A.K. Vasudevan, Influence of microstructure and load ratio on fatigue threshold behavior in 7075 alloys. Int. J. Fatigue 21, 255–262 (1999)
D.C. Lin, T.S. Wang, T.S. Srivatsan, A mechanism for the formation of equiaxed grains of aluminium–lithium alloy 2090. Mater. Sci. Eng., A 335, 304–309 (2003)
A.R.H. Midawi, E.B.F. Santos, N. Huda, A.K. Sinha, R. Lazor, A.P. Gerlich, Microstructures and mechanical properties in two X80 weld metals produced using similar heat input. J. Mater. Process. Technol. 226, 272–279 (2015)
Jong.-Bong. Kim, Jeong Whan Yoon, Necking behavior of AA 6022-T4 based on the crystal plasticity and damage models. Int. J. Plast 73, 3–23 (2015)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Verma, R.P., Pandey, K.N. Fracture Behavior of GMA Welded Joints of Dissimilar and Similar Aluminum Alloys of 6061-T6/5083-O. J Fail. Anal. and Preven. 17, 248–254 (2017). https://doi.org/10.1007/s11668-017-0235-1
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11668-017-0235-1