Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting
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...
Saved in:
Main Authors: | , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/143122 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-143122 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1431222020-09-26T22:05:55Z Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting Sun, Zhongji Tan, Xi Peng Descoins, Marion Mangelinck, Dominique Tor, Shu Beng Lim, Choon Seng School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Materials Additive Manufacturing High-entropy Alloy 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. National Research Foundation (NRF) Accepted version The authors are grateful for the use of resources in Singapore Centre for 3D Printing funded by the Singapore National Research Foundation (NRF). 2020-08-04T08:49:53Z 2020-08-04T08:49:53Z 2019 Journal Article 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 1359-6462 https://hdl.handle.net/10356/143122 10.1016/j.scriptamat.2019.04.036 2-s2.0-85065104866 168 129 133 en Scripta Materialia © 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. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
country |
Singapore |
collection |
DR-NTU |
language |
English |
topic |
Engineering::Materials Additive Manufacturing High-entropy Alloy |
spellingShingle |
Engineering::Materials Additive Manufacturing High-entropy Alloy Sun, Zhongji Tan, Xi Peng Descoins, Marion Mangelinck, Dominique Tor, Shu Beng Lim, Choon Seng Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
description |
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. |
author2 |
School of Mechanical and Aerospace Engineering |
author_facet |
School of Mechanical and Aerospace Engineering Sun, Zhongji Tan, Xi Peng Descoins, Marion Mangelinck, Dominique Tor, Shu Beng Lim, Choon Seng |
format |
Article |
author |
Sun, Zhongji Tan, Xi Peng Descoins, Marion Mangelinck, Dominique Tor, Shu Beng Lim, Choon Seng |
author_sort |
Sun, Zhongji |
title |
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
title_short |
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
title_full |
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
title_fullStr |
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
title_full_unstemmed |
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
title_sort |
revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting |
publishDate |
2020 |
url |
https://hdl.handle.net/10356/143122 |
_version_ |
1681056734005690368 |