Characteristics of YAG-MIG Hybrid Welding 6061 Aluminum Alloy with Different States

Abstract:

With the diversification of manufacture methods, joining the same materials with different states becomes indispensable in practical application. The hybrid welding has broad application prospects. It not only reduces the strict assembled gap before welding, but also improves the joint properties by filling wire during the welding process. 6061 aluminum alloys with different states were welded by YAG-MIG hybrid welding. The characteristics of welded joint, including microstructures, the tensile properties, microhardness and fracture, were investigated. The results show that the microstructures are different significantly in different states. Besides, the grain boundaries of the joint microstructures become unclear after heat treating. The strength and the elongations of welded joints could reach to that of the base metal. The tensile fracture occurs in the fusion zone and near 6061-O alloy. And the fracture presents ductile rupture. Meanwhile, the effect of the small pores in the weld on the joints tensile properties is slight.

• Periodical: Advanced Materials Research (Volumes 712-715)
• Pages: 666-669
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.712-715.666
• Online since: June 2013
• Authors: Fei Xu, Ya Fei Guo, Li Chen, Jing Yang
• Keywords: AA6061 Aluminum Alloy, Different States, Hybrid Welding, Microstructure, Tensile Properties

References

[1] Y.Q. Xiao, S.S. Xie, J.A. Liu and T. Wang: Practical handbook of aluminum fabrication technology (Metallurgical Industry Press, China 2005).

[2] T. Graf and H. Staufer: Welding Journal Vol. 82 (2003) No.1, p.42

[3] F. Xu, L. Chen, S.L. Gong, J. Yang, X.M. Zhao and E.G. He: Journal of Materials Engineering (2011) No.10, p.28

[4] C. Bagger and F.O. Olsen: Journal of Laser Application Vol. 1 (2005) No. 17, p.2

[5] J. Yang, X.Y. Li, S.L. Gong, L. Chen and F. Xu: Transactions of the China Welding Institution Vol. 31 (2010) No.2, p.83

[6] H.Y. Che, L. Zhu, J.H. Chen, W.F. Xu and X.F. Lv: Journal of Lanzhou University of Technology Vol. 34 (2008) No. 2, p.27

[7] J.H. Tong, L. Li, D. Deng and F.R. Wang: Journal of university of science and technology Beijing Vol. 30 (2008) No. 9, p.1011