Journal article
(Original article)


A multi-component evaporation model for beam melting processes


Publication Details
Author(s): Klassen A, Forster V, Körner C
Publisher: Institute of Physics Publishing
Publication year: 2017
Volume: 25
Journal issue: 2
ISSN: 1361-651X
Language: English

Abstract

In additive manufacturing using laser or electron beam melting technologies, evaporation losses and changes in chemical composition are known issues when processing alloys with volatile elements. In this paper, a recently described numerical model based on a two-dimensional free surface lattice Boltzmann method is further developed to incorporate the effects of multi-component evaporation. The model takes into account the local melt pool composition during heating and fusion of metal powder. For validation, the titanium alloy Ti-6Al-4V is melted by selective electron beam melting and analysed using mass loss measurements and high-resolution microprobe imaging. Numerically determined evaporation losses and spatial distributions of aluminium compare well with experimental data. Predictions of the melt pool formation in bulk samples provide insight into the competition between the loss of volatile alloying elements from the irradiated surface and their advective redistribution within the molten region.



Focus Area of Individual Faculties


How to cite
APA: Klassen, A., Forster, V., & Körner, C. (2017). A multi-component evaporation model for beam melting processes. Modelling and Simulation in Materials Science and Engineering, 25(2). https://dx.doi.org/10.1088/1361-651X/aa5289

MLA: Klassen, Alexander, Vera Forster, and Carolin Körner. "A multi-component evaporation model for beam melting processes." Modelling and Simulation in Materials Science and Engineering 25.2 (2017).

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