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Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition

The long, straight grain boundary of the high-entropy alloy (HEA) produced via laser melting deposition (LMD) is prone to cracking due to unidirectional scanning (single wall). To enhance the competitive growth of columnar grains and improve the overall performance of the alloy, a vertical cross sca...

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Autores principales: Ge, Fuyu, Liu, Shuai, Zhang, Xin, Shan, Mengdie, Peng, Cheng, Jia, Fanghui, Han, Jian, Cai, Yangchuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10488783/
https://www.ncbi.nlm.nih.gov/pubmed/37687658
http://dx.doi.org/10.3390/ma16175963
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author Ge, Fuyu
Liu, Shuai
Zhang, Xin
Shan, Mengdie
Peng, Cheng
Jia, Fanghui
Han, Jian
Cai, Yangchuan
author_facet Ge, Fuyu
Liu, Shuai
Zhang, Xin
Shan, Mengdie
Peng, Cheng
Jia, Fanghui
Han, Jian
Cai, Yangchuan
author_sort Ge, Fuyu
collection PubMed
description The long, straight grain boundary of the high-entropy alloy (HEA) produced via laser melting deposition (LMD) is prone to cracking due to unidirectional scanning (single wall). To enhance the competitive growth of columnar grains and improve the overall performance of the alloy, a vertical cross scanning method was employed to fabricate FeCoCrNi HEA (bulk). The influence of grain orientation on the microstructure and mechanical properties of FeCoCrNi-LMD was systematically investigated. Microhardness tests and tensile tests were conducted to assess the mechanical property differences between the single-wall and bulk samples. This study shows that using a single scanning strategy results in monolayer wall grains sized at 129.40 μm, with a max texture strength of 21.29. Employing orthogonal scanning yields 61.15 μm block-like grains with a max texture strength of 11.12. Dislocation densities are 1.084 × 10(12) m(−2) and 1.156 × 10(12) m(−2), with average Schmid factors of 0.471 and 0.416. In comparison to the FeCoCrNi-LMD single wall, the bulk material produced through cross-layer orthogonal scanning exhibited reduced residual stress, weakened anisotropy, and improved mechanical properties. These findings are expected to enhance the potential applications of FeCoCrNi-LMD in various industries.
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spelling pubmed-104887832023-09-09 Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition Ge, Fuyu Liu, Shuai Zhang, Xin Shan, Mengdie Peng, Cheng Jia, Fanghui Han, Jian Cai, Yangchuan Materials (Basel) Article The long, straight grain boundary of the high-entropy alloy (HEA) produced via laser melting deposition (LMD) is prone to cracking due to unidirectional scanning (single wall). To enhance the competitive growth of columnar grains and improve the overall performance of the alloy, a vertical cross scanning method was employed to fabricate FeCoCrNi HEA (bulk). The influence of grain orientation on the microstructure and mechanical properties of FeCoCrNi-LMD was systematically investigated. Microhardness tests and tensile tests were conducted to assess the mechanical property differences between the single-wall and bulk samples. This study shows that using a single scanning strategy results in monolayer wall grains sized at 129.40 μm, with a max texture strength of 21.29. Employing orthogonal scanning yields 61.15 μm block-like grains with a max texture strength of 11.12. Dislocation densities are 1.084 × 10(12) m(−2) and 1.156 × 10(12) m(−2), with average Schmid factors of 0.471 and 0.416. In comparison to the FeCoCrNi-LMD single wall, the bulk material produced through cross-layer orthogonal scanning exhibited reduced residual stress, weakened anisotropy, and improved mechanical properties. These findings are expected to enhance the potential applications of FeCoCrNi-LMD in various industries. MDPI 2023-08-31 /pmc/articles/PMC10488783/ /pubmed/37687658 http://dx.doi.org/10.3390/ma16175963 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ge, Fuyu
Liu, Shuai
Zhang, Xin
Shan, Mengdie
Peng, Cheng
Jia, Fanghui
Han, Jian
Cai, Yangchuan
Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title_full Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title_fullStr Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title_full_unstemmed Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title_short Effect of Grain Orientation on Microstructure and Mechanical Properties of FeCoCrNi High-Entropy Alloy Produced via Laser Melting Deposition
title_sort effect of grain orientation on microstructure and mechanical properties of fecocrni high-entropy alloy produced via laser melting deposition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10488783/
https://www.ncbi.nlm.nih.gov/pubmed/37687658
http://dx.doi.org/10.3390/ma16175963
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