Role of kinetics in laser processing

    Authors

    J. S. Kapat; Z. Wei;A. Kumar

    Comments

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    Abbreviated Journal Title

    Appl. Surf. Sci.

    Keywords

    laser-solid interaction; kinetics of melting; numerical simulation; spectral method; Chemistry, Physical; Materials Science, Coatings & Films; Physics, ; Applied; Physics, Condensed Matter

    Abstract

    A computational model has been developed in order to simulate any laser-induced surface modification process with or without the kinetics condition, Front-Fixing method with Landau transformation has been used to represent the geometric domain. Spectral collocation method has been utilized for spatial discretization in this model, while backwards differentiation has been used for temporal discretization. The computational model has been applied to the problem of laser-induced melting of an iron sheet with a medium power laser. In order to understand the importance of kinetics of phase transformation, the problem has been solved with and without the kinetics condition at the interface, and the results have been compared, It is observed from the test case that if kinetics condition is not used, the interface location is over-predicted and the free surface temperature is under-predicted. Both of these factors may have important consequences in several material processing techniques such as laser machining, laser annealing and pulsed laser ablation. (C) 1998 Elsevier Science B.V.

    Journal Title

    Applied Surface Science

    Volume

    127

    Publication Date

    1-1-1998

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    212

    Last Page

    217

    WOS Identifier

    WOS:000073768100034

    ISSN

    0169-4332

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