Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorChoe, Junghoen
dc.contributor.authorJung, Im Dooen
dc.contributor.authorYun, Jaecheolen
dc.contributor.authorYang, Sangsunen
dc.contributor.authorYu, Ji-Hunen
dc.contributor.authorYang, Dong-Yeolen
dc.contributor.authorKim, Yong-Jinen
dc.identifier.citationChoe, J., Yun, J., Jung, I. D., Yang, D.-Y., Yang, S., Kim, Y.- J., & Yu, J.-H. (2018). Densifying method in additive manufacturing process of H13 tool steel: laser re-melting. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 232-236. doi:10.25341/D4DW27en
dc.description.abstractAISI H13 tool steel structures were fabricated by selective laser melting which is one of the metal additive manufacturing process. Scanning speed of laser was controlled in the ranging of 100-1000 mm/s to optimize the process parameter to fabricate the highly densified structure. Laser power, hatch space and layer thickness were fixed at 90 W, 80 μm and 25 μm. Under 200 mm/s, spherical shape pores were observed and irregular shape pores were observed in over 400 mm/s samples. Residual pores were not easily removed by changing laser scanning speed alone and laser re-melting technique was applied to solve the pore problem. Each layers were exposed twice to laser with various scanning speed before re-coating the powder for next layer. Spherical shape pores were observed from all of the specimen exposed under 200 mm/s irrespective of another exposed laser speed. While re-melting over scanning speed of 800 mm/s did not showed effect on the densification, the combination of first scanning speed (400 mm/s) and second scanning speed (600 mm/s) showed the significant reduction of pores.en
dc.format.extent5 p.en
dc.rights© 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore.en
dc.subjectAdditive Manufacturingen
dc.subjectDRNTU::Engineering::Mechanical engineering::Prototypingen
dc.subjectSelective Laser Meltingen
dc.titleDensifying method in additive manufacturing process of H13 tool steel : laser re-meltingen
dc.typeConference Paperen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen
dc.contributor.conferenceProceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018)en
dc.contributor.researchSingapore Centre for 3D Printingen
dc.description.versionPublished versionen
item.fulltextWith Fulltext-
Appears in Collections:Pro-AM Conference Papers
Files in This Item:
File Description SizeFormat 

Google ScholarTM



Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.