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Laser welding of titanium alloys with an Yb: YAG sisk source

Béguin, Jean-Denis and Gazagne, Valentin and Balcaen, Yannick and Alexis, Joël and Andrieu, Eric Laser welding of titanium alloys with an Yb: YAG sisk source. (2018) Materials Science Forum, 941. 845-850. ISSN 1662-9752

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Official URL: https://doi.org/10.4028/www.scientific.net/MSF.941.845

Abstract

In this paper, the laser welding of thin titanium sheet in a butt joint configuration are investigated using a continuous Yb: YAG disk source, with high beam quality and a particular fiber configuration, enable to provide a broad range of beam diameters with different intensity distribution. The thermal efficiency of the laser process is discussed as a function of the fiber type. The weldability results for the CP Ti grade 2 and the Ti-6Al-4V titanium alloy are expressed in terms of full penetration, and correct bead geometry (NF L06-395-2000). Full penetration welds are easily achieved with the core fiber, but the outer fiber produces welds with limited geometric defects. Butt joints microstructure consists of an acicular α phase in the fusion zone for CP Ti, and a martensitic α’ phase for the Ti-6Al-4V alloy. Tensile test results confirm a similar or slightly higher joint strength for the full penetration welds, compared with the parent metal.

Item Type:Article
HAL Id:hal-02356317
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Laboratory name:
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Deposited By: Joël ALEXIS
Deposited On:13 Mar 2019 13:28

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