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Appl. Sci. 2019, 9(3), 583; https://doi.org/10.3390/app9030583

The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method

1
Department of Material Science and Engineering, Monash University, Clayton, VIC 3800, Australia
2
School of Science, Northeast Agricultural University, Harbin 150030, China
3
School of Mechanical Engineering, East University of Heilongjiang, Harbin 150080, China
4
Monash Centre for Additive Manufacturing, Notting Hill, VIC 3168, Australia
*
Author to whom correspondence should be addressed.
Received: 14 December 2018 / Revised: 25 January 2019 / Accepted: 28 January 2019 / Published: 11 February 2019
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Abstract

In view of the importance of accurately measuring the relative density of a selective laser melted (SLMed) part for optimizing the selective laser melting (SLM) processing parameters, suitable procedures of the Archimedes method considering the surface-connected cavities were proposed by comparing the results using the Archimedes method with image analysis. The effects of the SLM processing parameters on the relative density of AlSi10Mg were investigated using the proposed procedures of the Archimedes methods and image analysis. Fourteen SLMed samples were produced by different SLM processing parameters according to Doehlert Matrix. The regression models correlating relative density and three SLM processing parameters (laser power, scan speed, and hatching distance) were built and the optimum parameter combination to get a high relative density was obtained. By plotting the response surfaces and contours of the regression models, it was found that the relative densities are both higher at the combination of the higher scan speed, higher power, and lower hatching distance and at the combination of a lower scan speed, a moderate laser power, and a optional hatching distance. It was also found that the parameter of hatching distance is the crucial parameter to get a high relative density and to get high mechanical property. View Full-Text
Keywords: Archimedes method; image analysis; selective laser melting; optimization of parameters; AlSi10Mg alloy Archimedes method; image analysis; selective laser melting; optimization of parameters; AlSi10Mg alloy
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Bai, S.; Perevoshchikova, N.; Sha, Y.; Wu, X. The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method. Appl. Sci. 2019, 9, 583.

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