Authors

J. Xie;A. Kar

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

TRANSIT-TIME; SOLIDS; BEAM; HEAT; Physics, Applied

Abstract

Melting is encountered in almost all laser materials processing. This article deals with a one-dimensional heat conduction problem to investigate the melting rate during laser materials processing. The problem is solved approximately to obtain a correlation among melt depth, power density, and laser irradiation time. Based on this correlation, the dynamics of melting, a relationship between the melt depth and power density and an average melting velocity are expressed by simple analytic formulas. These expressions are further simplified for high power densities (I greater than or equal to 10(9) W/m(2)). The times to reach the melting and boiling temperatures at the surface of the workpiece are also calculated. (C) 1997 American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

81

Issue/Number

7

Publication Date

1-1-1997

Document Type

Article

Language

English

First Page

3015

Last Page

3022

WOS Identifier

WOS:A1997WT43200016

ISSN

0021-8979

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