Defect generation and propagation mechanism during additive manufacturing by selective beam melting

Journal article
(Original article)


Publication Details

Author(s): Bauereiß A, Scharowsky T, Körner C
Journal: Journal of Materials Processing Technology
Publisher: Elsevier Ltd
Publication year: 2014
Volume: 214
Journal issue: 11
Pages range: 2522-2528
ISSN: 0924-0136
Language: English


Abstract


During powder bed based additive manufacturing processes a component is fabricated by locally melting of powder layers with a laser or an electron beam. The fast melting process of the stochastic powder bed induces vigorous melt pool movements which sometimes lead to faults acting as starting points for larger defects such as channels bridging many layers. Since the formation of these defects cannot be understood in the framework of a homogenized numerical approach we have developed a mesoscopic numerical model based on the Lattice Boltzmann Method for the local melting process which considers individual powder particles. The model takes into account full hydrodynamics including capillary and wetting effects. It is shown that these effects combined with the stochastic powder layer are the origin of fault formation. The numerical results are compared with experiments in order to demonstrate the predictive value of our model. © 2014 Elsevier B.V.



FAU Authors / FAU Editors

Bauereiß, Andreas
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Scharowsky, Thorsten
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


How to cite

APA:
Bauereiß, A., Scharowsky, T., & Körner, C. (2014). Defect generation and propagation mechanism during additive manufacturing by selective beam melting. Journal of Materials Processing Technology, 214(11), 2522-2528. https://dx.doi.org/10.1016/j.jmatprotec.2014.05.002

MLA:
Bauereiß, Andreas, Thorsten Scharowsky, and Carolin Körner. "Defect generation and propagation mechanism during additive manufacturing by selective beam melting." Journal of Materials Processing Technology 214.11 (2014): 2522-2528.

BibTeX: 

Last updated on 2018-02-12 at 20:50