Title

Role of kinetics in laser processing

Comments

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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.

Publication 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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