Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88716
Title: Effects of chamber oxygen concentration on microstructure and mechanical properties of stainless steel 316L parts by selective laser melting
Authors: Sun, Zhongji
Tan, Xipeng
Tor, Shu Beng
Keywords: DRNTU::Engineering::Mechanical engineering::Prototyping
Additive Manufacturing
Selective Laser Melting
Issue Date: 2018
Source: Sun, Z., Tan, X., & Tor, S. B. (2018). Effects of chamber oxygen concentration on microstructure and mechanical properties of stainless steel 316L parts by selective laser melting. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 470-475. doi:10.25341/D4CS38
Abstract: Selective laser melting (SLM) is a disruptive additive manufacturing technology that makes metal parts directly from 3D models in an automate layer-wise manner. Numerous studies have been carried out to examine the effects of various factors, such as laser power, scanning parameter, powder feedstock shape, substrate temperatures etc, on the microstructure and mechanical properties of SLM-built parts. The present work focused on the influence of chamber oxygen concentration towards the SLM-built stainless steel 316L (SS316L) parts. Chamber oxygeninduced amorphous silicon-enriched nano-particles have been found to be ubiquitous in SLM-built SS316L parts. However, the contribution of these nano-particles towards the built part’s mechanical properties is still unclear. Three batches of SS316L samples with varying chamber oxygen concentrations of 0.08 mol%, 0.16 mol% and 0.24 mol% were fabricated by SLM. Tensile and Vickers hardness tests were conducted. Backscatter Electron Microscopy was employed to elucidate the mechanisms of these amorphous nano-particles on the overall mechanical performance.
URI: https://hdl.handle.net/10356/88716
http://hdl.handle.net/10220/45874
DOI: https://doi.org/10.25341/D4CS38
Rights: © 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Pro-AM Conference Papers

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