This paper presents the research on weldability of magnesium alloy AZ61 sheets by overlap laser welding, adhesive bonding, and laser seam weld bonding processes. Microstructures and mechanical properties of the joints are investigated. In overlap laser welding, the joint fractures at the interface between the sheets and maximum shear strength can reach 85% of that of the base metal. Off-center moment during tensile shear test can lead to the strength loss, while the weld edge can also influence the strength as a cracking source. Adhesive bonded joint can offer high tensile shear failure force but low peel strength. Laser weld bonded joint offers higher tensile shear failure force than either laser welded joint or adhesive bonded joint does, and the improved failure load is due to combined contribution of the weld seam and the adhesive. The weld seam can block the adhesive crack propagation, and the adhesive improves the stress distribution, so they can offer a synergistic effect.
The authors gratefully acknowledge the sponsorship from the National Natural Science Funds of China for Distinguished Young Scholar (51025520).
Kulekci M (2008) Magnesium and its alloys applications in automotive industry. Int J Adv Manuf Technol 39:851–865CrossRefGoogle Scholar
Luo A, Nyberg A, Sadayappan K, Shi W (2008) Magnesium front and research and development: a Canada-China-USA collaboration. The Minerals, Metals & Materials Society: Magnesium Technology: 3–10Google Scholar
Padmanaban G, Balasubramanian V (2010) An experimental investigation on friction stir welding of AZ31B magnesium alloy. Int J Adv Manuf Technol 49:111–121CrossRefGoogle Scholar
Yamamoto M, Gerlich A, North T, Shinozaki K (2007) Cracking in the stir zones of Mg-alloy friction stir spot welds. J Mater Sci 42:7657–7666CrossRefGoogle Scholar
Chi C, Chao C, Liu T, Wang C (2006) A study of weldability and fracture modes in electron beam weldments of AZ series magnesium alloys. Mater Sci Eng A 435–436:672–680Google Scholar
Hao X, Song G (2009) Spectral analysis of the plasma in low-power laser/arc hybrid welding of magnesium alloy. IEEE Trans Plasma Sci 37:76–82CrossRefGoogle Scholar
Zhang Z, Zhang F (2009) Spectral analysis of welding plasma of magnesium alloy using flux coated. Mater Trans 50:1909–1914CrossRefGoogle Scholar
Mahendra G, Balasubramanian V, Senthilvelan T (2009) Developing diffusion bonding windows for joining AZ31B agnesium and copper alloys. Int J Adv Manuf Technol 42:689–695CrossRefGoogle Scholar
Qi X, Song G (2010) Interfacial structure of the joints between magnesium alloy and mild steel with nickel as interlayer by hybrid laser-TIG welding. Mater Des 31:605–609CrossRefGoogle Scholar
Quan Y, Chen Z, Gong X, Yu Z (2008) CO2 laser beam welding of dissimilar magnesium-based alloys. Mater Sci Eng A 496:45–51CrossRefGoogle Scholar
Abderrazak K, Salem WB, Mhiri H, Bournot P, Autric M (2009) Nd:YAG laser welding of AZ91 magnesium alloy for aerospace industries. Metall Mater Trans B 48:54–61CrossRefGoogle Scholar
Bretz T, Lazarz A, Hill J, Blanchard J (2004) Adhesive bonding and corrosion protection of a die cast magnesium automotive door. Magnesium Technology: 113–119.Google Scholar