Compound quality assessment in laser beam melting processes using layer images
Zur Jacobsmühlen J, Kleszczynski S, Witt G, Merhof D (2017)
Publication Type: Conference contribution
Publication year: 2017
Publisher: Institute of Electrical and Electronics Engineers Inc.
Conference Proceedings Title: I2MTC 2017 - 2017 IEEE International Instrumentation and Measurement Technology Conference, Proceedings
Event location: Torino, ITA
ISBN: 9781509035960
DOI: 10.1109/I2MTC.2017.7969870
Abstract
Laser beam melting (LBM) is an additive manufacturing (AM) technology that allows the layer-based production of geometrically complex parts from metal powder. Non-destructive evaluation of part quality is a pre-requisite for widespread application of this promising technology and an ongoing research topic. In-process measurement of part layer compound quality will be beneficial during optimization of process parameters for best part quality. We inspect the part surface in high resolution layer images acquired after laser exposure. Based on a fast Fourier transform (FFT) we decompose surface images into laser scan lines (oriented component) and underlying powder structure (not oriented component). By computing the signal energy ratio we obtain a measure for the prominence of laser scan lines which is correlated with the compound quality. For 25 parts with varied laser power and scan velocity the signal energy ratio is compared to the computed energy input. A linear model achieves a root-mean-square error (RMSE) of 9.76Jmm-3. Additionally we automatically classify part regions as good/not good and compare our results to a manual selection based on light microscopy.
Involved external institutions
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen
Germany (DE)
Universität Duisburg-Essen (UDE)
Germany (DE)
Germany (DE)
Universität Duisburg-Essen (UDE)
Germany (DE)
How to cite
APA:
Zur Jacobsmühlen, J., Kleszczynski, S., Witt, G., & Merhof, D. (2017). Compound quality assessment in laser beam melting processes using layer images. In I2MTC 2017 - 2017 IEEE International Instrumentation and Measurement Technology Conference, Proceedings. Torino, ITA: Institute of Electrical and Electronics Engineers Inc..
MLA:
Zur Jacobsmühlen, Joschka, et al. "Compound quality assessment in laser beam melting processes using layer images." Proceedings of the 2017 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2017, Torino, ITA Institute of Electrical and Electronics Engineers Inc., 2017.
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