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Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy
The effect of heat treatment on the microstructure and tensile properties of an as-cast Al(0.6)CoCrFeNi high-entropy alloy (HEA) was investigated in this paper. The results show that the as-cast Al(0.6)CoCrFeNi HEA presents a typical FCC dendrite morphology with the interdendritic region consisting...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672926/ https://www.ncbi.nlm.nih.gov/pubmed/38005089 http://dx.doi.org/10.3390/ma16227161 |
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author | Hou, Pengyu Yang, Yue Zhang, Leilei Meng, Yi Cui, Yan Cao, Leigang |
author_facet | Hou, Pengyu Yang, Yue Zhang, Leilei Meng, Yi Cui, Yan Cao, Leigang |
author_sort | Hou, Pengyu |
collection | PubMed |
description | The effect of heat treatment on the microstructure and tensile properties of an as-cast Al(0.6)CoCrFeNi high-entropy alloy (HEA) was investigated in this paper. The results show that the as-cast Al(0.6)CoCrFeNi HEA presents a typical FCC dendrite morphology with the interdendritic region consisting of BCC/B2 structure and heat treatment can strongly affect the microstructure and mechanical properties of HEA. Microstructure analysis revealed the precipitation of a nano-sized L1(2) phase in the FCC dendrite and the formation of the FCC and σ phases in the interdendritic region after annealing at 700 °C. The coarse B2 phase was directly precipitated from the FCC dendrite in the 900 °C-annealed sample, with the coexistence of the B2, FCC, and σ phases in the interdendritic region. Then, the interdendritic region converted to a B2 and FCC dual-phase structure caused by the re-decomposition of the σ phase after annealing at 1100 °C. The tensile test results show that the 700 °C-annealed HEA presents the most significant strengthening effect, with increments of corresponding yield strength being about 107%, which can be attributed to the numerous nano-sized L1(2) precipitates in the FCC dendrite. The mechanical properties of 1100 °C-annealed alloy revert to a level close to that of the as-cast alloy, which can be attributed to the coarsening mechanism of B2 precipitates and the formation of a soft FCC phase in the interdendritic region. The observed variation in mechanical properties during heat treatment follows the traditional trade-off relationship between strength and plasticity. |
format | Online Article Text |
id | pubmed-10672926 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-106729262023-11-14 Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy Hou, Pengyu Yang, Yue Zhang, Leilei Meng, Yi Cui, Yan Cao, Leigang Materials (Basel) Article The effect of heat treatment on the microstructure and tensile properties of an as-cast Al(0.6)CoCrFeNi high-entropy alloy (HEA) was investigated in this paper. The results show that the as-cast Al(0.6)CoCrFeNi HEA presents a typical FCC dendrite morphology with the interdendritic region consisting of BCC/B2 structure and heat treatment can strongly affect the microstructure and mechanical properties of HEA. Microstructure analysis revealed the precipitation of a nano-sized L1(2) phase in the FCC dendrite and the formation of the FCC and σ phases in the interdendritic region after annealing at 700 °C. The coarse B2 phase was directly precipitated from the FCC dendrite in the 900 °C-annealed sample, with the coexistence of the B2, FCC, and σ phases in the interdendritic region. Then, the interdendritic region converted to a B2 and FCC dual-phase structure caused by the re-decomposition of the σ phase after annealing at 1100 °C. The tensile test results show that the 700 °C-annealed HEA presents the most significant strengthening effect, with increments of corresponding yield strength being about 107%, which can be attributed to the numerous nano-sized L1(2) precipitates in the FCC dendrite. The mechanical properties of 1100 °C-annealed alloy revert to a level close to that of the as-cast alloy, which can be attributed to the coarsening mechanism of B2 precipitates and the formation of a soft FCC phase in the interdendritic region. The observed variation in mechanical properties during heat treatment follows the traditional trade-off relationship between strength and plasticity. MDPI 2023-11-14 /pmc/articles/PMC10672926/ /pubmed/38005089 http://dx.doi.org/10.3390/ma16227161 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 Hou, Pengyu Yang, Yue Zhang, Leilei Meng, Yi Cui, Yan Cao, Leigang Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title | Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title_full | Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title_fullStr | Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title_full_unstemmed | Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title_short | Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Al(0)(.6)CoCrFeNi High-Entropy Alloy |
title_sort | effect of heat treatment on the microstructure and mechanical properties of the al(0)(.6)cocrfeni high-entropy alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672926/ https://www.ncbi.nlm.nih.gov/pubmed/38005089 http://dx.doi.org/10.3390/ma16227161 |
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