Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/143122
Title: | Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting | Authors: | Sun, Zhongji Tan, Xi Peng Descoins, Marion Mangelinck, Dominique Tor, Shu Beng Lim, Choon Seng |
Keywords: | Engineering::Materials | Issue Date: | 2019 | Source: | Sun, Z., Tan, X. P., Descoins, M., Mangelinck, D., Tor, S. B., & Lim, C. S. (2019). Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting. Scripta Materialia, 168, 129-133. doi:10.1016/j.scriptamat.2019.04.036 | Journal: | Scripta Materialia | Abstract: | Hot tearing mechanisms of a high-entropy alloy CoCrFeNi additively manufactured by selective laser melting have been investigated. Intergranular hot cracks are present regardless of various parameters used, suggesting poor laser-based printability for the alloy. Elemental segregation does not exist at the grain boundary that favours the hot cracking. We find that severe residual stress induced by the large grain size is the root cause for the intergranular cracking. The classic Rappaz-Drezet-Gremaud model is used to predict the characteristic depression pressure limit beyond which hot tearing will occur for the selective laser melting of metals and alloys. | URI: | https://hdl.handle.net/10356/143122 | ISSN: | 1359-6462 | DOI: | 10.1016/j.scriptamat.2019.04.036 | Schools: | School of Mechanical and Aerospace Engineering | Research Centres: | Singapore Centre for 3D Printing | Rights: | © 2019 Acta Materialia Inc. All rights reserved. This paper was published by Elsevier Ltd. in Scripta Materialia and is made available with permission of Acta Materialia Inc. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | SC3DP Journal Articles |
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