Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation
In this study, a novel preparation method for high-entropy alloys (HEAs) was developed. Al0.43CoCrFeNi2.1 HEA ingots were cast under complex shear flow, while a comparison group was cast without applying shear flow. Various characterization techniques were employed to analyze the microstructural dif...
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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/S223878542403031X |
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| author | Simeng Jiang Yaya Zhao Weijie Fan Weiyang Xie Yanlin Wang Xiaohua Chen Zidong Wang |
| author_facet | Simeng Jiang Yaya Zhao Weijie Fan Weiyang Xie Yanlin Wang Xiaohua Chen Zidong Wang |
| author_sort | Simeng Jiang |
| collection | DOAJ |
| description | In this study, a novel preparation method for high-entropy alloys (HEAs) was developed. Al0.43CoCrFeNi2.1 HEA ingots were cast under complex shear flow, while a comparison group was cast without applying shear flow. Various characterization techniques were employed to analyze the microstructural differences between the two samples. Molecular dynamics (MD) simulations were used to investigate the nucleation characteristics, microstructure evolution, and dislocation evolution during solidification. Additionally, to investigate the deformation properties and mechanical behavior of the two samples, uniaxial tension was applied to the solidified samples using MD simulations. The results reveal that by introducing severe shear flow, the equiaxed grains of the Al0.43CoCrFeNi2.1 HEA alloy were refined, twins were formed, and the likelihood of dislocation ring formation and dislocation entanglement during solidification decreased. Compared to the traditional method, the sample prepared by complex shear flow casting (CSFC) exhibits yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) of 330.7 MPa, 661.7 MPa, and 54.8%, respectively, showing increases of 23.1%, 26.6%, and 7.5%, respectively. The strengthening and toughening mechanisms were discussed, suggesting that the refinement of equiaxed grains, the elimination of dislocation entanglement, the twinning-induced plasticity (TWIP) effect during deformation, and the transformation-induced plasticity (TRIP) effect induced by fivefold twins contribute to the improvement of mechanical properties. The novel CFSC method holds significant potential for applications in HEAs. |
| format | Article |
| id | doaj-art-8e75786b04f544e1b6d141a866157ca0 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-8e75786b04f544e1b6d141a866157ca02025-01-09T06:14:04ZengElsevierJournal of Materials Research and Technology2238-78542025-03-01356781Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulationSimeng Jiang0Yaya Zhao1Weijie Fan2Weiyang Xie3Yanlin Wang4Xiaohua Chen5Zidong Wang6School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.wangzd@mater.ustb.edu.cnIn this study, a novel preparation method for high-entropy alloys (HEAs) was developed. Al0.43CoCrFeNi2.1 HEA ingots were cast under complex shear flow, while a comparison group was cast without applying shear flow. Various characterization techniques were employed to analyze the microstructural differences between the two samples. Molecular dynamics (MD) simulations were used to investigate the nucleation characteristics, microstructure evolution, and dislocation evolution during solidification. Additionally, to investigate the deformation properties and mechanical behavior of the two samples, uniaxial tension was applied to the solidified samples using MD simulations. The results reveal that by introducing severe shear flow, the equiaxed grains of the Al0.43CoCrFeNi2.1 HEA alloy were refined, twins were formed, and the likelihood of dislocation ring formation and dislocation entanglement during solidification decreased. Compared to the traditional method, the sample prepared by complex shear flow casting (CSFC) exhibits yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) of 330.7 MPa, 661.7 MPa, and 54.8%, respectively, showing increases of 23.1%, 26.6%, and 7.5%, respectively. The strengthening and toughening mechanisms were discussed, suggesting that the refinement of equiaxed grains, the elimination of dislocation entanglement, the twinning-induced plasticity (TWIP) effect during deformation, and the transformation-induced plasticity (TRIP) effect induced by fivefold twins contribute to the improvement of mechanical properties. The novel CFSC method holds significant potential for applications in HEAs.http://www.sciencedirect.com/science/article/pii/S223878542403031XHigh entropy alloyComplex shear flow castingMolecular dynamics simulationDislocationFivefold twins |
| spellingShingle | Simeng Jiang Yaya Zhao Weijie Fan Weiyang Xie Yanlin Wang Xiaohua Chen Zidong Wang Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation Journal of Materials Research and Technology High entropy alloy Complex shear flow casting Molecular dynamics simulation Dislocation Fivefold twins |
| title | Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation |
| title_full | Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation |
| title_fullStr | Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation |
| title_full_unstemmed | Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation |
| title_short | Enhanced mechanical properties of Al0.43CoCrFeNi2.1 high entropy alloy fabricated through complex shear flow casting: Experiment and MD simulation |
| title_sort | enhanced mechanical properties of al0 43cocrfeni2 1 high entropy alloy fabricated through complex shear flow casting experiment and md simulation |
| topic | High entropy alloy Complex shear flow casting Molecular dynamics simulation Dislocation Fivefold twins |
| url | http://www.sciencedirect.com/science/article/pii/S223878542403031X |
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