Elevated region area measurement for quantitative analysis of laser beam melting process stability

zur Jacobsmühlen J, Kleszczynski S, Witt G, Merhof D (2020)

Publication Type: Conference contribution

Publication year: 2020

Publisher: The University of Texas at Austin

Pages Range: 549-559

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 (LBM) processes enable layer-based production of geometrically complex metallic parts with very good mechanical properties for Rapid Manufacturing. Collisions between powder coating mechanism and elevated part regions pose a major risk to process stability, which is crucial for industrial application. Minimizing elevated region area usually involves parameter tuning in a trial-and-error approach, as the process outcome is the only measure of stability. One published approach to quantifying elevated region area utilizes an imaging system, which acquires layer images of the powder bed after powder deposition and detects elevated regions using image analysis. We extend the image-based analysis to each part region, create quantitative visualizations of elevated region area for quick assessment/comparison and compute a figure of merit. In experimental build jobs with overhanging structures and different support junction parameters we gain insight into problematic part regions, which can be used as feedback in job design. The presented method helps to improve LBM process stability, which is strongly linked to process efficiency.

Involved external institutions

Universität Duisburg-Essen (UDE) DE Germany (DE) Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen DE Germany (DE)

How to cite

APA:

zur Jacobsmühlen, J., Kleszczynski, S., Witt, G., & Merhof, D. (2020). Elevated region area measurement for quantitative analysis of laser beam melting process stability. 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. 549-559). Austin, TX, USA: The University of Texas at Austin.

MLA:

zur Jacobsmühlen, J., et al. "Elevated region area measurement for quantitative analysis of laser beam melting process stability." 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. 549-559.

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