Position dependency of surface roughness in parts from laser beam melting systems

Kleszczynski S, Ladewig A, Friedberger K, zur Jacobsmühlen J, Merhof D, Witt G (2020)

Publication Type: Conference contribution

Publication year: 2020

Publisher: The University of Texas at Austin

Pages Range: 360-370

Conference Proceedings Title: Proceedings - 26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015

Event location: Austin, TX, USA

Abstract

Laser Beam Melting is a promising Additive Manufacturing technology for the production of complex metal components. During batch production of multiple identical parts in a single build job, we observed parts with deviating surface roughness in certain areas, which all faced away from the laser. This suggests a dependency of surface roughness on the part position in the build chamber. In this work we systematically reproduce and analyze this effect. We place hollow pyramids with twelve faces and two different overhanging angles at nine positions on the substrate plate and build this setup twice, using an imaging setup for process documentation. Surface roughness is measured by contact profilometry on three lines for each pyramid face. Our experiments reproduce the effect. Based on these findings we present a hypothesis for the cause and show metallographic images to support our theory. As a consequence, the position relative to the laser should be considered in the design phase for parts with high surface quality requirements.

Involved external institutions

Universität Duisburg-Essen (UDE) DE Germany (DE) MTU Aero Engines AG DE Germany (DE) Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen DE Germany (DE)

How to cite

APA:

Kleszczynski, S., Ladewig, A., Friedberger, K., zur Jacobsmühlen, J., Merhof, D., & Witt, G. (2020). Position dependency of surface roughness in parts from laser beam melting systems. In David L. Bourell, Richard H. Crawford, Carolyn C. Seepersad, Joseph J. Beaman, Scott Fish, Harris Marcus (Eds.), Proceedings - 26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015 (pp. 360-370). Austin, TX, USA: The University of Texas at Austin.

MLA:

Kleszczynski, S., et al. "Position dependency of surface roughness in parts from laser beam melting systems." Proceedings of the 26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015, Austin, TX, USA Ed. David L. Bourell, Richard H. Crawford, Carolyn C. Seepersad, Joseph J. Beaman, Scott Fish, Harris Marcus, The University of Texas at Austin, 2020. 360-370.

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