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Proceedings Paper

Finite element studies of stress evolution in induction assisted laser cladding
Author(s): F. Brückner; D. Lepski; E. Beyer
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Paper Abstract

Cracking in laser cladding caused by inhomogeneous thermal expansion and/or phase transformations restricts the feasible feed rates and the use of high-strength coating materials. In order to better understand the physical reasons of thermal stress and cracking and to reduce the restrictions mentioned, the formation of beads and the evolution of the temperature and stress fields in laser cladding are simulated with and without inductive pre- or post-weld heating. The results of a semi-analytical analysis of the cladding process are transferred to a finite element model which calculates the temperature field, the phase transformations, and the residual stress and strain. These results show that both the danger of cracking due to high residual stress and strain and the distortion of the workpiece by irreversible plastic and thermo-metallurgical strain may be reduced by pre- or post-weld heating using inductors which can be directly integrated into the cladding process.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63461D (26 April 2007); doi: 10.1117/12.738143
Show Author Affiliations
F. Brückner, Dresden Univ. of Technology (Germany)
D. Lepski, Fraunhofer Institute for Material and Beam Technology IWS (Germany)
E. Beyer, Dresden Univ. of Technology (Germany)
Fraunhofer Institute for Material and Beam Technology IWS (Germany)


Published in SPIE Proceedings Vol. 6346:
XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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