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An Anisotropic Enhanced Thermal Conductivity Approach for Modelling Laser Melt Pools
Safdar, S; Pinkerton, Andrew; Moat, R; Li, Lin; Sheikh, Mohammad; Preuss, M; Withers, P J
In: 26th International Congress on Applications of Lasers and Electro-optics (ICALEO): 26th International Congress on Applications of Lasers and Electro-optics (ICALEO); 2007.
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Abstract
This paper presents an analysis of the widely-used isotropic enhanced thermal conductivity approach and compares it with a more advanced anisotropic approach for modelling the laser melting of Inconel 718. Experimental and modelled results for the geometry of a melt pool created by a moving laser beam are compared. It is found that the conventional enhanced thermal conductivity approach does not change the melt pool size and shape; it only reduces the maximum surface temperature. The anisotropic enhanced thermal conductivity approach on the other hand is able to modify the melt pool size and geometry and yields a better agreement with the experimental results.