T-joints of Ti alloys with hybrid laser-MIG welding: macro-graphic and micro-hardness analyses

R. Spina; D. Sorgente; G. Palumbo; L. D. Scintilla; M. Brandizzi; A. A. Satriano; L. Tricarico

doi:10.1117/12.910130

6 February 2012 T-joints of Ti alloys with hybrid laser-MIG welding: macro-graphic and micro-hardness analyses

R. Spina, D. Sorgente, G. Palumbo, L. D. Scintilla, M. Brandizzi, A. A. Satriano, L. Tricarico

Proceedings Volume 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications; 82390C (2012) https://doi.org/10.1117/12.910130
Event: SPIE LASE, 2012, San Francisco, California, United States

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.

Citation Download Citation

R. Spina, D. Sorgente, G. Palumbo, L. D. Scintilla, M. Brandizzi, A. A. Satriano, and 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); https://doi.org/10.1117/12.910130

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