Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment
Improving strength while retaining good ductility is crucial for expanding the application of 2219 Al alloy. In this study, refined microstructure, excellent strength and ductility were obtained for the 2219 Al alloy under the combined effects of ultrasonic melt treatment (UMT), hot rolling and T6 h...
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542302940X |
| _version_ | 1797301439808143360 |
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| author | Li Zhang Guan Huang Liguo Wang Guangxi Lu Shaokang Guan |
| author_facet | Li Zhang Guan Huang Liguo Wang Guangxi Lu Shaokang Guan |
| author_sort | Li Zhang |
| collection | DOAJ |
| description | Improving strength while retaining good ductility is crucial for expanding the application of 2219 Al alloy. In this study, refined microstructure, excellent strength and ductility were obtained for the 2219 Al alloy under the combined effects of ultrasonic melt treatment (UMT), hot rolling and T6 heat treatment (HRT6). The mean grain size declined from 664.2 μm to 194.9 μm for the as-cast 2219 Al alloy after 240s UMT, with a refining efficiency of 70.7 %. Meanwhile, the Cu content in Al matrix was increased by 41.7 %, and the area fraction of reticular eutectic structure was accordingly lessened by 64.5 %. The nucleation of θʹʹ/θʹ-Al2Cu phase was actuated owing to the increased Cu content in Al matrix, resulting in more dispersive θʹʹ/θʹ-Al2Cu precipitates in the HRT6 alloy with UMT. Besides, the recrystallization was encouraged because the boundaries of refined as-cast grains provided more favorable nucleation sites, and the increased dispersive θʹʹ/θʹ-Al2Cu precipitates would inhibits the grain boundary merging during HRT6. Thus, the average dimension of the recrystallized grains was decreased to the lowest value of 71.3 μm in the HRT6 alloy with 240s UMT. Meanwhile, the ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) were enhanced to 456.2 MPa, 307.0 MPa and 16.7 %, and precipitation strengthening contributed the most to the YS enhancement. The improved ductility was mainly due to the increased deformation capacity induced by the refined grains and reduced stress concentration caused by the dispersive θʹʹ/θʹ-Al2Cu particles. |
| first_indexed | 2024-03-07T23:22:33Z |
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| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:22:33Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2ccf050b57574ce492aa4abdf6ce9dbd2024-02-21T05:28:13ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012774707481Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatmentLi Zhang0Guan Huang1Liguo Wang2Guangxi Lu3Shaokang Guan4School of Materials Science and Engineering, Henan Key Laboratory of Advanced Magnesium Alloy, Zhengzhou University, Zhengzhou, 450001, China; Corresponding author.School of Materials Science and Engineering, Henan Key Laboratory of Advanced Magnesium Alloy, Zhengzhou University, Zhengzhou, 450001, ChinaSchool of Materials Science and Engineering, Henan Key Laboratory of Advanced Magnesium Alloy, Zhengzhou University, Zhengzhou, 450001, China; Key Laboratory of Materials Processing and Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450001, ChinaSchool of Materials Science and Engineering, Henan Key Laboratory of Advanced Magnesium Alloy, Zhengzhou University, Zhengzhou, 450001, ChinaSchool of Materials Science and Engineering, Henan Key Laboratory of Advanced Magnesium Alloy, Zhengzhou University, Zhengzhou, 450001, China; Key Laboratory of Materials Processing and Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450001, ChinaImproving strength while retaining good ductility is crucial for expanding the application of 2219 Al alloy. In this study, refined microstructure, excellent strength and ductility were obtained for the 2219 Al alloy under the combined effects of ultrasonic melt treatment (UMT), hot rolling and T6 heat treatment (HRT6). The mean grain size declined from 664.2 μm to 194.9 μm for the as-cast 2219 Al alloy after 240s UMT, with a refining efficiency of 70.7 %. Meanwhile, the Cu content in Al matrix was increased by 41.7 %, and the area fraction of reticular eutectic structure was accordingly lessened by 64.5 %. The nucleation of θʹʹ/θʹ-Al2Cu phase was actuated owing to the increased Cu content in Al matrix, resulting in more dispersive θʹʹ/θʹ-Al2Cu precipitates in the HRT6 alloy with UMT. Besides, the recrystallization was encouraged because the boundaries of refined as-cast grains provided more favorable nucleation sites, and the increased dispersive θʹʹ/θʹ-Al2Cu precipitates would inhibits the grain boundary merging during HRT6. Thus, the average dimension of the recrystallized grains was decreased to the lowest value of 71.3 μm in the HRT6 alloy with 240s UMT. Meanwhile, the ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) were enhanced to 456.2 MPa, 307.0 MPa and 16.7 %, and precipitation strengthening contributed the most to the YS enhancement. The improved ductility was mainly due to the increased deformation capacity induced by the refined grains and reduced stress concentration caused by the dispersive θʹʹ/θʹ-Al2Cu particles.http://www.sciencedirect.com/science/article/pii/S223878542302940X2219 Al alloyMicrostructureMechanical propertiesPrecipitation strengtheningHot rollingUltrasonic melt treatment |
| spellingShingle | Li Zhang Guan Huang Liguo Wang Guangxi Lu Shaokang Guan Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment Journal of Materials Research and Technology 2219 Al alloy Microstructure Mechanical properties Precipitation strengthening Hot rolling Ultrasonic melt treatment |
| title | Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment |
| title_full | Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment |
| title_fullStr | Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment |
| title_full_unstemmed | Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment |
| title_short | Microstructure-strengthening correlation of 2219 Al alloy subjected to ultrasonic melt treatment, hot rolling and heat treatment |
| title_sort | microstructure strengthening correlation of 2219 al alloy subjected to ultrasonic melt treatment hot rolling and heat treatment |
| topic | 2219 Al alloy Microstructure Mechanical properties Precipitation strengthening Hot rolling Ultrasonic melt treatment |
| url | http://www.sciencedirect.com/science/article/pii/S223878542302940X |
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