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Technical Briefs

Modeling of Melting, Evaporating, and Resolidifying Procedure in Laser-Induced Metal Processing

[+] Author and Article Information
Seungwon Shin

Department of Mechanical and System Design Engineering, Hongik University, Seoul 121-791, Korea

Haseung Chung1

Department of Mechanical and System Design Engineering, Hongik University, Seoul 121-791, Koreahaseung@hongik.ac.kr

1

Corresponding author.

J. Manuf. Sci. Eng 131(2), 024501 (Mar 17, 2009) (5 pages) doi:10.1115/1.3063654 History: Received March 05, 2008; Revised December 07, 2008; Published March 17, 2009

In this paper, we present a one-dimensional (1D) melting, evaporating, and resolidifying model describing the interaction of a scanning laser beam with a metal surface wherein the continuous and stepwise heat flux is applied. One set of 1D conduction equations, which is valid in all phases including solid, liquid, and vapor, has been developed along with two phase boundary conditions between the solid/liquid and liquid/air using an appropriate scaling law. The 1D heat equation has been solved separately in each phase using a sharp interface temperature technique based on the front tracking method. The generalized relations of nondimensional maximum melting depth, final evaporation depth, and maximum melting time related to nondimensional interaction time and heat flux factor are established.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of the physical model: (a) initial and final stage and (b) during the phase change process

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Figure 2

Schematic for the interpolation scheme used in the sharp interface temperature method

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Figure 3

Nondimensional maximum melting depth, ηmelting=(x/d)/(St⋅τint), as a function of heat flux factor, Q+, and nondimensional interaction time, τint

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Figure 4

Nondimensional final evaporation depth, ηvap=(xvap/d)/(St⋅τint), as a function of nondimensional interaction time, τint, and heat flux factor, Q+

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Figure 5

Nondimensional maximum melting time (τmax=τ/τint) as a function of nondimensional interaction time, τint, and heat flux factor, Q+

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