Study on joint characteristics in laser butt welding of AMed and wrought Ti6Al4V plates

Yasuhiro Okamoto, Togo Shinonaga*, Yoshito Takemoto, Akira Okada, Akihiro Ochi, Ryuya Kishimoto, Sisa Pityana, Nana Arthur, Peter O. Omoniyi, Rasheedat M. Mahamood, Martin Maina, Esther Akinlabi

*Corresponding author for this work

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Titanium alloy Ti6Al4V has been widely applied to medical, automotive, and aerospace industries due to its excellent properties such as high strength and excellent corrosion resistance. On the other hand, additive manufacturing (AM) technology can give the freedom of design of the products. In order to spread the AMed products, the joining of AMed and wrought products are required, and it is important to understand the joint characteristics. In this study, butt welding of Ti6Al4V plate was conducted by fiber laser in argon shielding, and the joint characteristics of laser weld wrought/wrought, AMed/AMed, and AMed/wrought Ti6Al4V plates were experimentally investigated. The AMed plate has higher tensile strength than wrought plate but the elongation of AMed plate is smaller, since AMed plate has α’ martensite due to rapid cooling during laser irradiation in AM process. Then, the laser weld joint of AMed/AMed plates has higher tensile strength, but smaller elongation than that of wrought/wrought plates. The weld joint of AMed/wrought plates shows good welding state, since small heat input leads to formation of small weld bead with higher hardness between wrought and AMed plates.
Original languageEnglish
Pages (from-to)1997-2005
Number of pages9
JournalWelding in the World, Le Soudage Dans Le Monde
Issue number8
Early online date8 Jun 2023
Publication statusPublished - 1 Aug 2023

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