Development and experimental validation of analytical thermal models for the evaluation of the depth of laser-treated zones

 
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1998 (EL)

Development and experimental validation of analytical thermal models for the evaluation of the depth of laser-treated zones (EN)

Pantelis, DI (EN)
Vonatsos, KN (EN)

In order to estimate the depth of the heat-affected zone (HAZ) and the laser-melted zone (LMZ), during laser surface treatment, the Fourier differential equation is usually used, which is quite difficult to solve analytically for particular boundary and initial conditions. A new methodology is being proposed which leads to new formulas, estimating the heat-affected zone in the case where no melting occurs, and allows even complicated laser energy distribution profiles to be used. Specifically, Duhamel's principle is used leading to a convolution, which is integrated analytically by using a Taylor series approximation. Also, a new analytical thermal model has been developed, for the case where melting occurs, by using a moving-front approach. For both cases the calculated values of heat-affected zone and laser-melted zone are in good agreement with the experimental values. © Springer-Verlag 1998. (EN)

journalArticle (EN)

Thermal diffusion (EN)
Melting (EN)
Experimental Validation (EN)
Partial differential equations (EN)
Materials Science, Multidisciplinary (EN)
Boundary conditions (EN)
Steel (EN)
Heat flux (EN)
Surface treatment (EN)
Physics, Applied (EN)
Laser melted zone (EN)
Laser beam effects (EN)
Thermal conductivity (EN)
Thermal Model (EN)
Approximation theory (EN)
Mathematical models (EN)
Fourier differential equation (EN)
Heat affected zone (EN)
Taylor series approximation (EN)


Applied Physics A: Materials Science and Processing (EN)

Αγγλική γλώσσα

1998 (EN)

67 (EN)
0947-8396 (EN)
4 (EN)
435 (EN)
439 (EN)
ISI:000076721900012 (EN)
10.1007/s003390050800 (EN)

SPRINGER VERLAG (EN)




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