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

Chakraborty, Suman ; Dutta, Pradip (2002) Numerical modeling of heat and mass transfer in laser surface alloying: non-equilibrium solidification effects Materials and Manufacturing Processes, 17 (4). pp. 455-468. ISSN 1042-6914

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

Related URL: http://dx.doi.org/10.1081/AMP-120014228

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:Article
Source: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
ID Code:101223
Deposited On:23 Dec 2016 10:07
Last Modified:23 Dec 2016 10:07

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