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The Theory of Laser Materials Processing

Hüttner, Bernd and Dowden, John and Schulz, Wolfgang and Kaplan, Alexander and Richardson, Ian and Lepski, Dietrich and Pretorius, Thomas and Gross, Markus (2009) The Theory of Laser Materials Processing. In: The Theory of Laser Materials Processing Heat and Mass Transfer in Modern Technology, 119. Springer. pp. 315-338. ISBN 13 978-1-4020-9339-5. ISSN 1860-0832

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Official URL: http://www.springer.com

Abstract

In this chapter some aspects of the interaction of femtosecond laser pulses with metals has been considered and compared with the effects of longer pulses. The most important point is, perhaps, that metals exposed to femtosecond laser pulses are no longer in local thermal equilibrium. On short time scales the electron and phonon subsystem are decoupled and may have very different temperatures. Moreover, the electrons are governed by a nonequilibrium distribution and not by the Fermi-Dirac distribution even for low intensities. In many cases, depending on the value of the electron temperature relaxation time, the parabolic heat conduc-tion (TTM) is no longer suitable for the determination of the electron temperature distribution and should be replaced by the ETTM.

Document Type:Book Section
Title:The Theory of Laser Materials Processing
Authors:
AuthorsInstitution or Email of Authors
Hüttner, BerndUNSPECIFIED
Dowden, JohnDept. of Math. Sciences, Uni. of Essex, UK
Schulz, WolfgangILT Aachen
Kaplan, AlexanderLuela University of Technology, Sweden
Richardson, IanDept. Material Sciences and Engineering, Delft, Netherlands
Lepski, DietrichFHI for Material and Beam Technology, Dresden
Pretorius, ThomasBIAS, Bremen
Gross, MarkusUni. of Cambridge, Dept. of Engineering, UK
Date:January 2009
Journal or Publication Title:The Theory of Laser Materials Processing
Volume:119
Page Range:pp. 315-338
Editors:
EditorsEmail
Dowden, JohnUNSPECIFIED
Publisher:Springer
Series Name:Heat and Mass Transfer in Modern Technology
ISSN:1860-0832
ISBN:13 978-1-4020-9339-5
Status:Published
Keywords:electron-electron scattering time, nonequilibrium electron distribution, femtosecond laser pulses, change of optical and thermal properties, electron and phonon temperature distribution, two-temperature model, extended two-temperature model
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Lampoldshausen , Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Bernd Hüttner
Deposited On:02 Mar 2009
Last Modified:27 Apr 2009 15:50

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