TITLE

Modeling of humps formation during deep-penetration laser welding

AUTHOR(S)
Amara, E. H.; Fabbro, R.
PUB. DATE
October 2010
SOURCE
Applied Physics A: Materials Science & Processing;Oct2010, Vol. 101 Issue 1, p111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
3-D transient modeling based on the numerical resolution of the fluid flow ant the heat transfer equations is developed for deep-penetration laser welding at high-welding speed regime, which results in the humping phenomenon. The physical mechanisms included in our model concern matter melting, vaporization inducing a recoil pressure, and resolidification. The implementation of developed procedures called User Defined Functions (UDFs) working interactively with the CFD Fluent code and a dynamic mesh method allowed us to treat the problem with specific and complex boundary conditions. The recoil pressure, fusion, resolidification, and the temperature dependence of the physical properties were thus taken into account. As a result, regular humps could be observed after resolidification on the weld seam.
ACCESSION #
54517279

 

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