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Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting
This study investigated the anisotropic characteristics of the microstructural, mechanical and corrosion properties of CoCrFeMnNi high-entropy alloy produced by selective laser melting (SLM) additive manufacturing (AM). Under the extremely high thermal gradient during the SLM process, a columnar sol...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7764294/ https://www.ncbi.nlm.nih.gov/pubmed/33322091 http://dx.doi.org/10.3390/ma13245687 |
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author | Wang, Bowen Sun, Miao Li, Bobo Zhang, Lijuan Lu, Bingheng |
author_facet | Wang, Bowen Sun, Miao Li, Bobo Zhang, Lijuan Lu, Bingheng |
author_sort | Wang, Bowen |
collection | PubMed |
description | This study investigated the anisotropic characteristics of the microstructural, mechanical and corrosion properties of CoCrFeMnNi high-entropy alloy produced by selective laser melting (SLM) additive manufacturing (AM). Under the extremely high thermal gradient during the SLM process, a columnar solidification structure with a single face-centered cubic (FCC) phase structure was formed. The crystal structure exhibited a regular checkerboard structure in the XOY plane (perpendicular to the building direction), which was composed of {110} direction and a small amount of {100} fiber texture. The cellular-dendritic sub-structures formed in the columnar crystal structure with sizes of about 500 nm in diameter. As for the mechanical properties, the XOY plane exhibited higher ultimate tensile strength and yield strength (σ(0.2)) but lower elongation to failure compared to the XOZ plane (parallel to building direction), which reflected the anisotropy of the microstructure. The electrochemical test results of the different planes showed that the XOZ plane exhibited better corrosion resistance in comparison with the XOY plane in the 3.5 wt % NaCl solution, which was on account of the selective attack at the Mn-rich inter-cellular regions and the different structures of the cellular-dendritic sub-structures on different planes. |
format | Online Article Text |
id | pubmed-7764294 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-77642942020-12-27 Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting Wang, Bowen Sun, Miao Li, Bobo Zhang, Lijuan Lu, Bingheng Materials (Basel) Article This study investigated the anisotropic characteristics of the microstructural, mechanical and corrosion properties of CoCrFeMnNi high-entropy alloy produced by selective laser melting (SLM) additive manufacturing (AM). Under the extremely high thermal gradient during the SLM process, a columnar solidification structure with a single face-centered cubic (FCC) phase structure was formed. The crystal structure exhibited a regular checkerboard structure in the XOY plane (perpendicular to the building direction), which was composed of {110} direction and a small amount of {100} fiber texture. The cellular-dendritic sub-structures formed in the columnar crystal structure with sizes of about 500 nm in diameter. As for the mechanical properties, the XOY plane exhibited higher ultimate tensile strength and yield strength (σ(0.2)) but lower elongation to failure compared to the XOZ plane (parallel to building direction), which reflected the anisotropy of the microstructure. The electrochemical test results of the different planes showed that the XOZ plane exhibited better corrosion resistance in comparison with the XOY plane in the 3.5 wt % NaCl solution, which was on account of the selective attack at the Mn-rich inter-cellular regions and the different structures of the cellular-dendritic sub-structures on different planes. MDPI 2020-12-13 /pmc/articles/PMC7764294/ /pubmed/33322091 http://dx.doi.org/10.3390/ma13245687 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Bowen Sun, Miao Li, Bobo Zhang, Lijuan Lu, Bingheng Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title | Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title_full | Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title_fullStr | Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title_full_unstemmed | Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title_short | Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting |
title_sort | anisotropic response of cocrfemnni high-entropy alloy fabricated by selective laser melting |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7764294/ https://www.ncbi.nlm.nih.gov/pubmed/33322091 http://dx.doi.org/10.3390/ma13245687 |
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