Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors
Industrial production of fine-grained Al-Mg-Si alloys usually involves homogenization of cast ingots and deformation at extreme conditions (temperature, force). This work demonstrates a more efficient route, where the as-cast 6xxx Al-Mg-Si alloys achieve superior grain refinement (5.43 ± 5.7 µm) com...
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Elsevier
2025-08-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525006938 |
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| author | Jiawei Luo Jin Zhang Wei Xiong |
| author_facet | Jiawei Luo Jin Zhang Wei Xiong |
| author_sort | Jiawei Luo |
| collection | DOAJ |
| description | Industrial production of fine-grained Al-Mg-Si alloys usually involves homogenization of cast ingots and deformation at extreme conditions (temperature, force). This work demonstrates a more efficient route, where the as-cast 6xxx Al-Mg-Si alloys achieve superior grain refinement (5.43 ± 5.7 µm) compared to homogenized samples (17.13 ± 22.1 µm) at warm deformation temperature (270℃). Moreover, non-closed high-angle grain boundaries (HAGBs) and closed-loop HAGBs, which respectively represent the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX), are identified and statistically analyzed. Results show that the as-cast Al-Mg-Si alloy activated CDRX and DDRX more rapidly than its homogenized state at warm deformation temperatures, TEM observations have revealed that this was caused by elemental segregation along grain boundaries, which reduces grain boundary energy and thus facilitates recrystallization nucleation, additionally, it consumes a significant amount of solute atoms and facilitates the CDRX at grain interiors. In contrast, the HG-AlMgSi contains high amount of nano-precipitates which hinders dislocation motion, suppressing CDRX. This study offers new insights into the dynamic recrystallization behavior of as-cast and homogenized Al-Mg-Si aluminum alloy at warm deformation temperatures and highlights the potential of rapid production method of fine-grained aluminum alloys. |
| format | Article |
| id | doaj-art-51429b5df2e24f55a8c8b9c48e518a5c |
| institution | Matheson Library |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-51429b5df2e24f55a8c8b9c48e518a5c2025-06-26T09:52:00ZengElsevierMaterials & Design0264-12752025-08-01256114273Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviorsJiawei Luo0Jin Zhang1Wei Xiong2Light Alloy Research Institute, Central South University, Changsha 410083, ChinaLight Alloy Research Institute, Central South University, Changsha 410083, China; State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Changsha 410083, ChinaLight Alloy Research Institute, Central South University, Changsha 410083, China; State Key Laboratory of Precision Manufacturing for Extreme Service Performance, Changsha 410083, China; Corresponding author at: Light Alloy Research Institute, Central South University, Changsha 410083, China.Industrial production of fine-grained Al-Mg-Si alloys usually involves homogenization of cast ingots and deformation at extreme conditions (temperature, force). This work demonstrates a more efficient route, where the as-cast 6xxx Al-Mg-Si alloys achieve superior grain refinement (5.43 ± 5.7 µm) compared to homogenized samples (17.13 ± 22.1 µm) at warm deformation temperature (270℃). Moreover, non-closed high-angle grain boundaries (HAGBs) and closed-loop HAGBs, which respectively represent the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX), are identified and statistically analyzed. Results show that the as-cast Al-Mg-Si alloy activated CDRX and DDRX more rapidly than its homogenized state at warm deformation temperatures, TEM observations have revealed that this was caused by elemental segregation along grain boundaries, which reduces grain boundary energy and thus facilitates recrystallization nucleation, additionally, it consumes a significant amount of solute atoms and facilitates the CDRX at grain interiors. In contrast, the HG-AlMgSi contains high amount of nano-precipitates which hinders dislocation motion, suppressing CDRX. This study offers new insights into the dynamic recrystallization behavior of as-cast and homogenized Al-Mg-Si aluminum alloy at warm deformation temperatures and highlights the potential of rapid production method of fine-grained aluminum alloys.http://www.sciencedirect.com/science/article/pii/S0264127525006938Al-Mg-Si alloyHot compressionGrain boundary segregationAs-cast microstructureDynamic recrystallization (DRX) |
| spellingShingle | Jiawei Luo Jin Zhang Wei Xiong Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors Materials & Design Al-Mg-Si alloy Hot compression Grain boundary segregation As-cast microstructure Dynamic recrystallization (DRX) |
| title | Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| title_full | Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| title_fullStr | Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| title_full_unstemmed | Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| title_short | Efficient grain refinement of as-cast Al-Mg-Si alloy via warm deformation: grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| title_sort | efficient grain refinement of as cast al mg si alloy via warm deformation grain boundary based quantitative analysis on its dynamic recrystallization behaviors |
| topic | Al-Mg-Si alloy Hot compression Grain boundary segregation As-cast microstructure Dynamic recrystallization (DRX) |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525006938 |
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