dc.contributor.authorTan, Joel Heang Kuan
dc.contributor.authorYeong, Wai Yee
dc.date.accessioned2018-09-05T06:33:22Z
dc.date.available2018-09-05T06:33:22Z
dc.date.issued2018
dc.identifier.citationTan, J. H. K., & Yeong, W. Y. (2018). Multi-layer 2D grain structure simulation in selective laser melting of stainless steel 316L. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 321-327. doi:10.25341/D4GW2Ven_US
dc.identifier.urihttp://hdl.handle.net/10220/45835
dc.description.abstractAdditive manufacturing (AM) of metals allows high customization and offers manufacturing with greater geometrical freedom. Performance of metals is highly dependent on the microstructure, while the formation of microstructures in printed metal parts depends largely on the process parameters. Numerical studies of AM processes provide insights on the processing parameters and the thermal interaction between energy source and the material. In this article, grain structure of selective laser melted part was investigated using cellular automata and finite element method. Finite element method was used to obtain the temperature history of metal powders and substrate. Thereafter, the temperature history was input to a cellular automata model to simulate the formation of grain structure and grain angles. The models were simulated in 2D and for multiple build layers. Two cases with different scanning speeds were investigated while the energy density was kept constant. The size and angles of grains were investigated. It was found that competitive growth happen in the first two layers and little change in grains happen after the third layer. The shorter melt pool lead to coarser grains and lower fraction of high angle grain boundaries (HAGB). While the longer melt pool lead to finger grains and higher fraction of HAGB.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.format.extent7 p.en_US
dc.language.isoenen_US
dc.rights© 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore.en_US
dc.subjectAdditive Manufacturingen_US
dc.subjectNumerical Simulationen_US
dc.subjectDRNTU::Engineering::Mechanical engineering::Prototypingen_US
dc.titleMulti-layer 2D grain structure simulation in selective laser melting of stainless steel 316Len_US
dc.typeConference Paper
dc.contributor.conferenceProceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018)en_US
dc.contributor.researchSingapore Centre for 3D Printingen_US
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.identifier.doihttps://doi.org/10.25341/D4GW2V
dc.description.versionPublished versionen_US


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