%0 conference lecture
%@ 
%A Staron, P.,Liu, J.,Riekehr, S.,Schell, N.,Huber, N.,Kashaev, N.,Mueller, M.,Schreyer, A.

%D 2015
%J 8th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS VIII
%N 
%P  

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