dc.contributor.authorTan, Jie Lun
dc.contributor.authorTang, Cheng
dc.contributor.authorWong, Chee How
dc.identifier.citationTan, J. L., Tang, C., & Wong, C. H. (2018). A computational study on porosity evolution in parts produced by selective laser melting. Metallurgical and Materials Transactions A, 49(8), 3663-3673. doi:10.1007/s11661-018-4697-xen_US
dc.description.abstractSelective laser melting (SLM) is a powder-bed additive manufacturing process that uses laser to melt powders, layer by layer to generate a functional 3D part. There are many different parameters, such as laser power, scanning speed, and layer thickness, which play a role in determining the quality of the printed part. These parameters contribute to the energy density applied on the powder bed. Defects arise when insufficient or excess energy density is applied. A common defect in these cases is the presence of porosity. This paper studies the formation of porosities when inappropriate energy densities are used. A computational model was developed to simulate the melting and solidification process of SS316L powders in the SLM process. Three different sets of process parameters were used to produce 800-µm-long melt tracks, and the characteristics of the porosities were analyzed. It was found that when low energy density parameters were used, the pores were found to be irregular in shapes and were located near the top surface of the powder bed. However, when high energy density parameters were used, the pores were either elliptical or spherical in shapes and were usually located near the bottom of the keyholes.en_US
dc.description.sponsorshipEDB (Economic Devt. Board, S’pore)en_US
dc.format.extent29 p.en_US
dc.relation.ispartofseriesMetallurgical and Materials Transactions Aen_US
dc.rights© 2018 The Minerals, Metals & Materials Society and ASM International. All rights reserved. This paper was published by Springer in Metallurgical and Materials Transactions A and is made available with permission of The Minerals, Metals & Materials Society and ASM International.en_US
dc.subjectSelective Laser Meltingen_US
dc.titleA computational study on porosity evolution in parts produced by selective laser meltingen_US
dc.typeJournal Article
dc.contributor.researchSingapore Centre for 3D Printingen_US
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.description.versionAccepted versionen_US

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