Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy
Employing molten glass purification and cyclic overheating technologies, a Cu60Ni40 alloy was modified by introducing trace amounts of Co element. Through this process, we aimed to understand how the addition of Co element influences the microstructure morphology of the alloy. By combining the BCT m...
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423033215 |
| _version_ | 1827368259221979136 |
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| author | Xiaolong Xu Yanxin Yuan Hua Hou Yuhong Zhao |
| author_facet | Xiaolong Xu Yanxin Yuan Hua Hou Yuhong Zhao |
| author_sort | Xiaolong Xu |
| collection | DOAJ |
| description | Employing molten glass purification and cyclic overheating technologies, a Cu60Ni40 alloy was modified by introducing trace amounts of Co element. Through this process, we aimed to understand how the addition of Co element influences the microstructure morphology of the alloy. By combining the BCT model and metallographic analysis, the intrinsic factors of microstructure transformation in the alloy were studied. In the case of small undercooling, solute diffusion dominates dendritic growth, but the undercooled melt is limited to a narrow range of growth, resulting in the formation of coarse dendritic morphology in Cu–Ni alloy. As the undercooling increases, the growth of dendrites is gradually controlled by both solute diffusion and thermal diffusion, and the remelting effect of dendrites is also gradually enhanced. During rapid solidification with lower undercooling, the dendrites formed by the undercooled melt can be remelted to form numerous crystal seeds. Within a moderate undercooling range, dendrites grow directionally due to thermal diffusion and exhibit specific characteristics. At high undercooling, the dendrites' directional growth, primarily driven by thermal diffusion, undergoes stress fragmentation. |
| first_indexed | 2024-03-08T09:28:58Z |
| format | Article |
| id | doaj.art-8fe74df8c4ae4418a10da0329b595da9 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:58Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-8fe74df8c4ae4418a10da0329b595da92024-01-31T05:44:18ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012838923902Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloyXiaolong Xu0Yanxin Yuan1Hua Hou2Yuhong Zhao3School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-performance Al/Mg Alloy Materials, Taiyuan 030051, PR China; State Key Laboratory of Solidifification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China; Corresponding author. School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China.School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-performance Al/Mg Alloy Materials, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-performance Al/Mg Alloy Materials, Taiyuan 030051, PR China; Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Corresponding author. School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China.School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-performance Al/Mg Alloy Materials, Taiyuan 030051, PR China; School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, PR China; Corresponding author. School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China.Employing molten glass purification and cyclic overheating technologies, a Cu60Ni40 alloy was modified by introducing trace amounts of Co element. Through this process, we aimed to understand how the addition of Co element influences the microstructure morphology of the alloy. By combining the BCT model and metallographic analysis, the intrinsic factors of microstructure transformation in the alloy were studied. In the case of small undercooling, solute diffusion dominates dendritic growth, but the undercooled melt is limited to a narrow range of growth, resulting in the formation of coarse dendritic morphology in Cu–Ni alloy. As the undercooling increases, the growth of dendrites is gradually controlled by both solute diffusion and thermal diffusion, and the remelting effect of dendrites is also gradually enhanced. During rapid solidification with lower undercooling, the dendrites formed by the undercooled melt can be remelted to form numerous crystal seeds. Within a moderate undercooling range, dendrites grow directionally due to thermal diffusion and exhibit specific characteristics. At high undercooling, the dendrites' directional growth, primarily driven by thermal diffusion, undergoes stress fragmentation.http://www.sciencedirect.com/science/article/pii/S2238785423033215Rapid solidificationGrain-refined microstructureRecrystallizationUndercooling |
| spellingShingle | Xiaolong Xu Yanxin Yuan Hua Hou Yuhong Zhao Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy Journal of Materials Research and Technology Rapid solidification Grain-refined microstructure Recrystallization Undercooling |
| title | Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy |
| title_full | Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy |
| title_fullStr | Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy |
| title_full_unstemmed | Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy |
| title_short | Study on structure refinement mechanism in rapid solidification of a deeply undercooled Cu60Ni38Co2 alloy |
| title_sort | study on structure refinement mechanism in rapid solidification of a deeply undercooled cu60ni38co2 alloy |
| topic | Rapid solidification Grain-refined microstructure Recrystallization Undercooling |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423033215 |
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