Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy
Since the high resistance to deformation and low thermal conductivity of high-entropy alloys (HEAs), the strengthening and toughening strategies based on thermomechanical processing are time-consuming and costly. Thus, it is more practical to enhance the strength and ductility of the as-cast HEAs. I...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425002558 |
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| author | W.Z. Xiao W.B. Wang Y.K. Wu J.Q. Ren R. Yang W. Li Q. Wang |
| author_facet | W.Z. Xiao W.B. Wang Y.K. Wu J.Q. Ren R. Yang W. Li Q. Wang |
| author_sort | W.Z. Xiao |
| collection | DOAJ |
| description | Since the high resistance to deformation and low thermal conductivity of high-entropy alloys (HEAs), the strengthening and toughening strategies based on thermomechanical processing are time-consuming and costly. Thus, it is more practical to enhance the strength and ductility of the as-cast HEAs. In this work, an equiatomic CoCrFeNiCu HEA was prepared, and that exhibited a yield strength (Rp0.2) of 318 MPa and elongation to failure (EL) of 65%, which has an increment Rp0.2 of 148 MPa and comparable EL comparing with that of the as-cast CoCrFeNi HEA. The experimental observations and molecular dynamics (MD) simulation demonstrated that, these superior tensile properties were caused by the coherent interface induced by the continues Cu-rich phase, which can not only effectively refine the FCC matrix size, but also alleviate the stress concentration at the interface. These findings provide a template for simultaneously improving the yield strength and ductility of other as-cast HEAs by introducing coherent interfaces. |
| format | Article |
| id | doaj-art-90b90f91292844a693399fb8e2538968 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-90b90f91292844a693399fb8e25389682025-02-12T05:31:12ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013533843392Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloyW.Z. Xiao0W.B. Wang1Y.K. Wu2J.Q. Ren3R. Yang4W. Li5Q. Wang6School of Energy Engineering, Huanghuai University, Zhumadian, 463000, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, ChinaLuoyang Ship Material Research Institute, Luoyang, 471003, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; Corresponding author.Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, ChinaSchool of Energy Engineering, Huanghuai University, Zhumadian, 463000, China; Corresponding author.Since the high resistance to deformation and low thermal conductivity of high-entropy alloys (HEAs), the strengthening and toughening strategies based on thermomechanical processing are time-consuming and costly. Thus, it is more practical to enhance the strength and ductility of the as-cast HEAs. In this work, an equiatomic CoCrFeNiCu HEA was prepared, and that exhibited a yield strength (Rp0.2) of 318 MPa and elongation to failure (EL) of 65%, which has an increment Rp0.2 of 148 MPa and comparable EL comparing with that of the as-cast CoCrFeNi HEA. The experimental observations and molecular dynamics (MD) simulation demonstrated that, these superior tensile properties were caused by the coherent interface induced by the continues Cu-rich phase, which can not only effectively refine the FCC matrix size, but also alleviate the stress concentration at the interface. These findings provide a template for simultaneously improving the yield strength and ductility of other as-cast HEAs by introducing coherent interfaces.http://www.sciencedirect.com/science/article/pii/S2238785425002558High-entropy alloyCoCrFeNiCuAs-castCoherent interface |
| spellingShingle | W.Z. Xiao W.B. Wang Y.K. Wu J.Q. Ren R. Yang W. Li Q. Wang Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy Journal of Materials Research and Technology High-entropy alloy CoCrFeNiCu As-cast Coherent interface |
| title | Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy |
| title_full | Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy |
| title_fullStr | Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy |
| title_full_unstemmed | Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy |
| title_short | Influence of continuous Cu-rich phase on the deformation mechanism in as-cast CoCrFeNiCu high-entropy alloy |
| title_sort | influence of continuous cu rich phase on the deformation mechanism in as cast cocrfenicu high entropy alloy |
| topic | High-entropy alloy CoCrFeNiCu As-cast Coherent interface |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425002558 |
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