Prediction of microstructures in laser welding of stainless steel AISI 304

    Authors

    W. Guo;A. Kar

    Comments

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    Abbreviated Journal Title

    J. Laser Appl.

    Keywords

    laser welding; microstructure evolution; stainless steel 304; SOLIDIFICATION PROCESSES; ALLOYS; INSTABILITY; GROWTH; MODEL; Materials Science, Multidisciplinary; Optics; Physics, Applied

    Abstract

    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 Title

    Journal of Laser Applications

    Volume

    11

    Issue/Number

    4

    Publication Date

    1-1-1999

    Document Type

    Article

    Language

    English

    First Page

    185

    Last Page

    189

    WOS Identifier

    WOS:000081965000005

    ISSN

    1042-346X

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