Analytical expressions for the threshold of deep-penetration laser welding

Explicit analytical expressions are derived based on a simplified model as a convenient estimation of the requirements to reach the threshold of deep-penetration laser welding. For materials with high heat conductivity and low surface tension the simple formulas allow determining the material-depend...

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Bibliographic Details
Published inLaser physics letters Vol. 12; no. 5; pp. 56002 - 56006
Main Authors Graf, Thomas, Berger, Peter, Weber, Rudolf, Hügel, Helmut, Heider, Andreas, Stritt, Peter
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.05.2015
Subjects
deep-penetration welding threshold
heat-conduction equation
laser welding
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Summary:Explicit analytical expressions are derived based on a simplified model as a convenient estimation of the requirements to reach the threshold of deep-penetration laser welding. For materials with high heat conductivity and low surface tension the simple formulas allow determining the material-dependent minimum power required for deep-penetration laser welding as a function of the diameter and the travel speed of the beam on the work piece surface. Within this area of application of the model the derived formulas agree well with experimental results.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-2011/12/5/056002