GS30 Anneal effect of internal strain in steel material with laser welding

Abstract

In this study, we present anneal effect of internal strain in steel material with laser welding by using synchrotron radiation white X-rays in SPring-8. Internal strain distributions were measured by the strain scanning method based on X-ray diffraction technique. A strong compressive strain appeared in the region of affected laser welding directly in welding material before annealing, and a weak compressive strain remained in the same region after annealing. We think that this cause is remained plastic strain generated by slip.