Study of the local phase composition and morphology of laser welded joints based on titanium and aluminum alloys by diffraction of hard synchrotron radiation

In the results of this study, the changes in the phase composition of welded joints of the parts made from VT20 titanium alloy and V-1461 aluminum alloy are presented. When laser radiation moves along the joint between the materials, a large number of intermetallic joints, as well as an increase in the size of crystallites, are recorded in the weld. By shifting the projection of the laser radiation focus towards the titanium alloy, it was possible to obtain an intermetallic layer of micron size between the materials being welded, and to increase the strength of the welded joint.