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  4. Correlations of melt pool geometry and process parameters during laser metal deposition by coaxial process monitoring
 
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2014
Conference Paper
Title

Correlations of melt pool geometry and process parameters during laser metal deposition by coaxial process monitoring

Abstract
One major demand of today's laser metal deposition (LMD) processes is to achieve a fail-save build-up regarding changing conditions like heat accumulations. Especially for the repair of thin parts like turbine blades is the knowledge about the correlations between melt pool behavior and process parameters like laser power, feed rate and powder mass stream indispensable. The paper will show the process layout with the camera based coaxial monitoring system and the quantitative influence of the process parameters on the melt pool geometry. Therefore the diameter, length and area of the melt pool are measured by a video analytic system at various parameters and compared with the track wide in cross-sections and the laser spot diameter. The influence of changing process conditions on the melt pool is also investigated. On the base of these results an enhanced process of the build-up of a multilayer one track fillet geometry will be presented.
Author(s)
Ocylok, S.
Alexeev, E.
Mann, S.
Weisheit, A.
Wissenbach, K.
Kelbassa, I.
Mainwork
Laser Assisted Net Shape Engineering 8  
Conference
International Conference on Laser Assisted Net Shape Engineering (LANE) 2014  
International Conference on Photonic Technologies 2014  
Open Access
DOI
10.1016/j.phpro.2014.08.167
Additional full text version
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Fraunhofer-Institut für Lasertechnik ILT  
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