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Numerical modeling of heat and mass transfer in laser surface alloying: Non-equilibrium solidification effects

Chakraborty, Suman and Dutta, Pradip (2002) Numerical modeling of heat and mass transfer in laser surface alloying: Non-equilibrium solidification effects. In: Materials and Manufacturing Processes, 17 (4). 455-468 .

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Official URL: http://www.tandfonline.com/doi/abs/10.1081/AMP-120...

Abstract

A transient macroscopic model is developed for studying heat and mass transfer in a single-pass laser surface alloying process, with particular emphasis on non-equilibrium solidification considerations. The solution for species concentration distribution requires suitable treatment of non-equilibrium mass transfer conditions. In this context, microscopic features pertaining to non-equilibrium effects on account of solutal undercooling are incorporated through the formulation of a modified partition-coefficient. The effective partition-coefficient is numerically modeled by Means of a number of macroscopically observable parameters related to the solidifying domain. The numerical model is so developed that the modifications on account of non-equilibrium solidification considerations can be conveniently implemented in existing numerical codes based on equilibrium solidification considerations.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Keywords: Modeling;Laser;Surface alloying;Single-pass;Non-equilibrium; Solutal undercooling;Solidification;Heat and mass transfer
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 21 Jul 2011 06:07
Last Modified: 21 Jul 2011 06:07
URI: http://eprints.iisc.ernet.in/id/eprint/39311

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