6 February 2012 T-joints of Ti alloys with hybrid laser-MIG welding: macro-graphic and micro-hardness analyses
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Abstract
Titanium alloys are characterized by high mechanical properties and elevated corrosion resistance. The combination of laser welding with MIG/GMAW has proven to improve beneficial effects of both processes (keyhole, gap-bridging ability) while limiting their drawbacks (high thermal gradient, low mechanical resistance) In this paper, the hybrid Laser-GMAW welding of Ti-6Al-4V 3-mm thick sheets is investigated using a specific designed trailing shield. The joint geometry was the double fillet welded T-joint. Bead morphologies, microstructures and mechanical properties (micro-hardness) of welds were evaluated and compared to those achieved for the base metals.
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R. Spina, D. Sorgente, G. Palumbo, L. D. Scintilla, M. Brandizzi, A. A. Satriano, L. Tricarico, "T-joints of Ti alloys with hybrid laser-MIG welding: macro-graphic and micro-hardness analyses", Proc. SPIE 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, 82390C (6 February 2012); doi: 10.1117/12.910130; https://doi.org/10.1117/12.910130
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