In Situ Experiment for Laser Beam Welding of Ti Alloys Using High-Energy X-Rays

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The laser beam welding (LBW) process has many advantages for industrial production; however, it still has to be optimized for two-phase Ti alloys. Phase transformations and residual stresses play a crucial role for welding these alloys. Specific questions about the development of phase content during fast heating with a laser and rapid cooling can only be addressed with time-resolved in-situ experiments, avoiding artefacts from quenching. Also the residual stress development during cooling depends on the occurring phase transformations. Thus, an LBW chamber employing a fibre laser was developed for use with high-energy X-rays from a synchrotron source. Bead-on-plate welding experiments with 2.5 mm thick samples were carried out at the HZG high-energy materials science beamline (HEMS) at DESY, Hamburg. The first experiments focused on the solid-solid phase transformations in a Ti-6Al-4V alloy. Moreover, residual stresses developing during cooling were studied.

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Edited by:

Thomas Holden, Tamas Ungar, Thomas Buslaps and Thilo Pirling

Pages:

114-119

Citation:

P. Staron et al., "In Situ Experiment for Laser Beam Welding of Ti Alloys Using High-Energy X-Rays", Materials Science Forum, Vol. 905, pp. 114-119, 2017

Online since:

August 2017

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$38.00

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