Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy
In this work, CoCrFeNiMo0.35 high entropy alloy was hot-rolled at 900 °C by varying different reductions (10%, 20%, 30%, 40%, 50%) and the impact of hot rolling on the structure and mechanical properties of this alloy has been investigated. It is found that the phase composition of CoCrFeNiMo0.35 hi...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025936 |
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| author | Xiuli Ma Baolin Wei Xiaoning Feng Peng Peng Yuanli Xu Xudong Zhang Zhikun Ma |
| author_facet | Xiuli Ma Baolin Wei Xiaoning Feng Peng Peng Yuanli Xu Xudong Zhang Zhikun Ma |
| author_sort | Xiuli Ma |
| collection | DOAJ |
| description | In this work, CoCrFeNiMo0.35 high entropy alloy was hot-rolled at 900 °C by varying different reductions (10%, 20%, 30%, 40%, 50%) and the impact of hot rolling on the structure and mechanical properties of this alloy has been investigated. It is found that the phase composition of CoCrFeNiMo0.35 high entropy alloy after hot rolling has not been changed, and it still consists of FCC phase and σ phase (Cr and Mo-rich phase), which is the same as the as-cast state alloy. Besides, the grain size becomes finer after hot rolling and is stretched to a flat shape in the rolling direction, and the grain orientation gradually changes from <001> and <101> direction to <101> direction with the increase of reduction. At the same time, as the increase of rolling reduction, the volume fraction of σ phase increases, and the yield strength (∼817.8 MPa), tensile strength (∼891.7 MPa) and hardness of the alloy are improved. The comprehensive influence of fine grain strengthening, second phase strengthening and dislocation strengthening is the main reason for this result. Besides, the fracture mode of the tensile sample changes from mixed tough-brittle fracture to brittle fracture. The research results can be used as a reference for hot rolling strengthening of CoCrFeNiMo0.35 high entropy alloy. |
| format | Article |
| id | doaj-art-c1fd4bc844d649ef92b1506d291372e9 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-c1fd4bc844d649ef92b1506d291372e92025-08-20T02:39:09ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01338111812010.1016/j.jmrt.2024.11.065Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloyXiuli Ma0Baolin Wei1Xiaoning Feng2Peng Peng3Yuanli Xu4Xudong Zhang5Zhikun Ma6School of Materials and Energy, Lanzhou University, Lanzhou, ChinaSchool of Materials and Energy, Lanzhou University, Lanzhou, ChinaSchool of Materials and Energy, Lanzhou University, Lanzhou, ChinaCorresponding author. ol of Materials and Energy, Lanzhou University, Lanzhou, China.; School of Materials and Energy, Lanzhou University, Lanzhou, ChinaSchool of Materials and Energy, Lanzhou University, Lanzhou, ChinaSchool of Materials and Energy, Lanzhou University, Lanzhou, ChinaSchool of Materials and Energy, Lanzhou University, Lanzhou, ChinaIn this work, CoCrFeNiMo0.35 high entropy alloy was hot-rolled at 900 °C by varying different reductions (10%, 20%, 30%, 40%, 50%) and the impact of hot rolling on the structure and mechanical properties of this alloy has been investigated. It is found that the phase composition of CoCrFeNiMo0.35 high entropy alloy after hot rolling has not been changed, and it still consists of FCC phase and σ phase (Cr and Mo-rich phase), which is the same as the as-cast state alloy. Besides, the grain size becomes finer after hot rolling and is stretched to a flat shape in the rolling direction, and the grain orientation gradually changes from <001> and <101> direction to <101> direction with the increase of reduction. At the same time, as the increase of rolling reduction, the volume fraction of σ phase increases, and the yield strength (∼817.8 MPa), tensile strength (∼891.7 MPa) and hardness of the alloy are improved. The comprehensive influence of fine grain strengthening, second phase strengthening and dislocation strengthening is the main reason for this result. Besides, the fracture mode of the tensile sample changes from mixed tough-brittle fracture to brittle fracture. The research results can be used as a reference for hot rolling strengthening of CoCrFeNiMo0.35 high entropy alloy.http://www.sciencedirect.com/science/article/pii/S2238785424025936High entropy alloyHot rollingPlastic deformationStrengthening mechanisms |
| spellingShingle | Xiuli Ma Baolin Wei Xiaoning Feng Peng Peng Yuanli Xu Xudong Zhang Zhikun Ma Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy Journal of Materials Research and Technology High entropy alloy Hot rolling Plastic deformation Strengthening mechanisms |
| title | Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy |
| title_full | Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy |
| title_fullStr | Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy |
| title_full_unstemmed | Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy |
| title_short | Effect of rolling process on deformation structure and mechanical properties of CoCrFeNiMo0.35 high entropy alloy |
| title_sort | effect of rolling process on deformation structure and mechanical properties of cocrfenimo0 35 high entropy alloy |
| topic | High entropy alloy Hot rolling Plastic deformation Strengthening mechanisms |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025936 |
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