Prediction of microstructures in laser welding of stainless steel AISI 304
Abbreviated Journal Title
J. Laser Appl.
laser welding; microstructure evolution; stainless steel 304; SOLIDIFICATION PROCESSES; ALLOYS; INSTABILITY; GROWTH; MODEL; Materials Science, Multidisciplinary; Optics; Physics, Applied
A mathematical model is proposed to investigate the evolution of microstructures due to rapid solidification in laser materials processing. The instability of solid-liquid interface is analyzed by considering the diffusion process and perturbation method. The results of this model show that the neutral stability curve is largely dependent on solidification rate and partition coefficient. The decay, periodic oscillation, and growth of the perturbations at the solid-liquid interface can be regarded as planar, cellular and dendritic microstructures, respectively. Laser spot welding experiments were conducted for stainless steel AISI 304 to verify the theoretical predictions. (C) 1999 Laser Institute of America. [S1042-346X(99)00102-3].
Journal of Laser Applications
"Prediction of microstructures in laser welding of stainless steel AISI 304" (1999). Faculty Bibliography 1990s. 2658.