Numerical simulation for phenomenological evaluation of laser welding processes

Yamashita, Susumu   ; Yamada, Tomonori; Kunugi, Tomoaki*; Muramatsu, Toshiharu

Toward the phenomenological understanding of laser welding repair processes for various reactor components by numerical simulation, we constructed laser welding simulation code which can treat combined physical phenomena including interfaces, a phase change and stress evaluation in solid materials using several advanced numerical models. In the calculations of low-power density laser welding, we obtained particular results in the welding, e.g., thermal-shaped molten pool, a welding bead and a stress distribution around the molten pool. Therefore, our numerical code will be appropriate tool for elucidating laser welding phenomena in the near future.