Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion
The industrial applications of Al–Mg–Si alloys conductors still meet the big challenges of strength and conductivity trade-off. In the present work, a special continuous expansion extrusion forming (CEEF) with violent shearing deformation was performed on continuous cast 6101 Al alloy rods to proces...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422018610 |
| _version_ | 1797943049634971648 |
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| author | Zeye Chen Ruiqing Lu Shuwei Zheng Jie Tang Fulin Jiang Lei Deng Liang Huang Jie Teng |
| author_facet | Zeye Chen Ruiqing Lu Shuwei Zheng Jie Tang Fulin Jiang Lei Deng Liang Huang Jie Teng |
| author_sort | Zeye Chen |
| collection | DOAJ |
| description | The industrial applications of Al–Mg–Si alloys conductors still meet the big challenges of strength and conductivity trade-off. In the present work, a special continuous expansion extrusion forming (CEEF) with violent shearing deformation was performed on continuous cast 6101 Al alloy rods to process the sheets with improved mechanical and electrical properties by combining various artificial aging treatments. The results showed that refined dendrites with few intergranular phases and high supersaturation solid solubility could be obtained in the continuous casted rods with fast cooling rate. In the CEEF sheet, the gradient distribution of grain size from the core to the surface of the sheet was observed, where the grain size of processed sheet was refined remarkably by dynamic recovery (DRV) and dynamic recrystallization (DRX). When artificial aging was conducted on the as-extruded, solid-solution and pre-deformed alloy specimens respectively, different precipitation responses were found. The high-density dislocations in the pre-deformed alloy acted as pipes for rapid diffusion of solid solution atoms to accelerate their precipitation, reducing the matrix solid solution atom content and mitigating electron scattering phenomena. As a result, simultaneous improvements of strength and conductivity could be obtained by combining the above optimized strategies. |
| first_indexed | 2024-04-10T20:18:14Z |
| format | Article |
| id | doaj.art-d8578bd94b5e4bbfaeedc240ba0c3712 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-10T20:18:14Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-d8578bd94b5e4bbfaeedc240ba0c37122023-01-26T04:45:45ZengElsevierJournal of Materials Research and Technology2238-78542023-01-0122445460Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusionZeye Chen0Ruiqing Lu1Shuwei Zheng2Jie Tang3Fulin Jiang4Lei Deng5Liang Huang6Jie Teng7College of Materials Science and Engineering, Hunan University, Changsha 410082, ChinaAecc South Industry Company Limited, Zhuzhou 412002, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha 410082, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha 410082, China; Corresponding author.College of Materials Science and Engineering, Hunan University, Changsha 410082, China; State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Corresponding author.State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaCollege of Materials Science and Engineering, Hunan University, Changsha 410082, China; Corresponding author.The industrial applications of Al–Mg–Si alloys conductors still meet the big challenges of strength and conductivity trade-off. In the present work, a special continuous expansion extrusion forming (CEEF) with violent shearing deformation was performed on continuous cast 6101 Al alloy rods to process the sheets with improved mechanical and electrical properties by combining various artificial aging treatments. The results showed that refined dendrites with few intergranular phases and high supersaturation solid solubility could be obtained in the continuous casted rods with fast cooling rate. In the CEEF sheet, the gradient distribution of grain size from the core to the surface of the sheet was observed, where the grain size of processed sheet was refined remarkably by dynamic recovery (DRV) and dynamic recrystallization (DRX). When artificial aging was conducted on the as-extruded, solid-solution and pre-deformed alloy specimens respectively, different precipitation responses were found. The high-density dislocations in the pre-deformed alloy acted as pipes for rapid diffusion of solid solution atoms to accelerate their precipitation, reducing the matrix solid solution atom content and mitigating electron scattering phenomena. As a result, simultaneous improvements of strength and conductivity could be obtained by combining the above optimized strategies.http://www.sciencedirect.com/science/article/pii/S2238785422018610Al–Mg–Si alloysDeformationMicrostructureMechanical propertyConductivity |
| spellingShingle | Zeye Chen Ruiqing Lu Shuwei Zheng Jie Tang Fulin Jiang Lei Deng Liang Huang Jie Teng Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion Journal of Materials Research and Technology Al–Mg–Si alloys Deformation Microstructure Mechanical property Conductivity |
| title | Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| title_full | Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| title_fullStr | Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| title_full_unstemmed | Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| title_short | Microstructural characteristics and deformation behaviors of an Al–Mg–Si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| title_sort | microstructural characteristics and deformation behaviors of an al mg si alloy with improved strength and conductivity processed by continuous casting and expansion extrusion |
| topic | Al–Mg–Si alloys Deformation Microstructure Mechanical property Conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422018610 |
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