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Article

Dimensional Errors Due to Overhanging Features in Laser Powder Bed Fusion Parts Made of Ti-6Al-4V

1
Institute for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggensten-Leopoldshafen, Germany
2
Faculty of Engineering, Port Said University, Port Fuad 42526, Egypt
3
3D Systems, 3001 Leuven, Belgium
4
Karlsruhe Nano Micro Facility, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(7), 2416; https://doi.org/10.3390/app10072416
Received: 6 March 2020 / Revised: 24 March 2020 / Accepted: 30 March 2020 / Published: 1 April 2020
(This article belongs to the Special Issue Micro/Nano Manufacturing II)
The rise in popularity of Additive Manufacturing technologies and their increased adoption for manufacturing have created a requirement for their fast development and maturity. However, there is still room for improvement when compared with conventional manufacturing in terms of the predictability, quality, and robustness. Statistical analysis has proven to be an excellent tool for developing process knowledge and optimizing different processes efficiently and effectively. This paper uses a novel method for printing overhanging features in Ti-6Al-4V metal parts, by varying process parameters only within the down-facing area, and establishes a methodology for predicting dimensional errors in flat 45° down-facing surfaces. Using the process parameters laser power, scan speed, scan spacing, scan pattern, and layer thickness, a quadratic regression equation is developed and tested. An Analysis of variance (ANOVA) analysis concluded that, within the down-facing area, the laser power is the most significant process parameter, followed by the layer thickness and scan speed. Comparatively, the scanning pattern is determined to be insignificant, which is explained by the small down-facing area where the various scanning patterns play no role. This paper also discusses the interaction effects between parameters. Some thoughts on the next steps to be taken for further validation are discussed. View Full-Text
Keywords: Additive Manufacturing; regression; laser powder bed fusion; statistical analysis Additive Manufacturing; regression; laser powder bed fusion; statistical analysis
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MDPI and ACS Style

Charles, A.; Elkaseer, A.; Thijs, L.; Scholz, S.G. Dimensional Errors Due to Overhanging Features in Laser Powder Bed Fusion Parts Made of Ti-6Al-4V. Appl. Sci. 2020, 10, 2416. https://doi.org/10.3390/app10072416

AMA Style

Charles A, Elkaseer A, Thijs L, Scholz SG. Dimensional Errors Due to Overhanging Features in Laser Powder Bed Fusion Parts Made of Ti-6Al-4V. Applied Sciences. 2020; 10(7):2416. https://doi.org/10.3390/app10072416

Chicago/Turabian Style

Charles, Amal, Ahmed Elkaseer, Lore Thijs, and Steffen G. Scholz 2020. "Dimensional Errors Due to Overhanging Features in Laser Powder Bed Fusion Parts Made of Ti-6Al-4V" Applied Sciences 10, no. 7: 2416. https://doi.org/10.3390/app10072416

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