Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment
During the new continuous casting direct rolling (CCDR) process for manufacturing commercially pure aluminum sheet for foils, casting defects tend to arise as the raw material with huge mass flow rapidly solidifies under a high cooling rate, which generates negative effects on the formability of alu...
| Main Authors: | , , , , |
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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/S2238785422019159 |
| _version_ | 1797943050574495744 |
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| author | Ripeng Jiang Wenhao Zhao Li Zhang Xiaoqian Li Shaokang Guan |
| author_facet | Ripeng Jiang Wenhao Zhao Li Zhang Xiaoqian Li Shaokang Guan |
| author_sort | Ripeng Jiang |
| collection | DOAJ |
| description | During the new continuous casting direct rolling (CCDR) process for manufacturing commercially pure aluminum sheet for foils, casting defects tend to arise as the raw material with huge mass flow rapidly solidifies under a high cooling rate, which generates negative effects on the formability of aluminum sheets and the performance of final foil products. Therefore, melt pre-treatment during continuous casting is very essential to improve the quality of the billet. In this study, multi-source ultrasonic field was employed to pretreat an Al melt during the continuous casting stage in a Hazelett CCDR strip production line. The Ti content distribution in the melt, the microstructure and corrosion behaviors of the rolled sheet with and without ultrasonic melt pre-treatment (UMPT) were investigated. The microstructure of the rolled sheet was refined due to the increased Ti content and uniformly distributed Al3Ti particles under UMPT. In addition, the morphology of the Fe-containing secondary phase was modified from an aggregated to a scattered structure, with reduced continuity. As a result, under the combined effects of the refined α-Al grains and secondary phase, the corrosion resistance of the rolled sheet was improved. The underlying mechanisms for the modifications of the microstructure and corrosion resistance after UMPT are also interpreted, which gives theoretical guidance on the practical applications of the ultrasound-assisted continuous casting in industrial production. |
| first_indexed | 2024-04-10T20:18:16Z |
| format | Article |
| id | doaj.art-da3ce44c5eb44f1fbda337ec29eb6e0c |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-10T20:18:16Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-da3ce44c5eb44f1fbda337ec29eb6e0c2023-01-26T04:46:04ZengElsevierJournal of Materials Research and Technology2238-78542023-01-012215221532Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatmentRipeng Jiang0Wenhao Zhao1Li Zhang2Xiaoqian Li3Shaokang Guan4Light Alloy Research Institute, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaLight Alloy Research Institute, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; Corresponding author.Light Alloy Research Institute, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; Corresponding author.During the new continuous casting direct rolling (CCDR) process for manufacturing commercially pure aluminum sheet for foils, casting defects tend to arise as the raw material with huge mass flow rapidly solidifies under a high cooling rate, which generates negative effects on the formability of aluminum sheets and the performance of final foil products. Therefore, melt pre-treatment during continuous casting is very essential to improve the quality of the billet. In this study, multi-source ultrasonic field was employed to pretreat an Al melt during the continuous casting stage in a Hazelett CCDR strip production line. The Ti content distribution in the melt, the microstructure and corrosion behaviors of the rolled sheet with and without ultrasonic melt pre-treatment (UMPT) were investigated. The microstructure of the rolled sheet was refined due to the increased Ti content and uniformly distributed Al3Ti particles under UMPT. In addition, the morphology of the Fe-containing secondary phase was modified from an aggregated to a scattered structure, with reduced continuity. As a result, under the combined effects of the refined α-Al grains and secondary phase, the corrosion resistance of the rolled sheet was improved. The underlying mechanisms for the modifications of the microstructure and corrosion resistance after UMPT are also interpreted, which gives theoretical guidance on the practical applications of the ultrasound-assisted continuous casting in industrial production.http://www.sciencedirect.com/science/article/pii/S2238785422019159Continuous casting direct rollingUltrasonic melt pre-treatmentGrain refinementFe-containing phaseCorrosion resistance |
| spellingShingle | Ripeng Jiang Wenhao Zhao Li Zhang Xiaoqian Li Shaokang Guan Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment Journal of Materials Research and Technology Continuous casting direct rolling Ultrasonic melt pre-treatment Grain refinement Fe-containing phase Corrosion resistance |
| title | Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment |
| title_full | Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment |
| title_fullStr | Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment |
| title_full_unstemmed | Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment |
| title_short | Microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre-treatment |
| title_sort | microstructure and corrosion resistance of commercial purity aluminum sheet manufactured by continuous casting direct rolling after ultrasonic melt pre treatment |
| topic | Continuous casting direct rolling Ultrasonic melt pre-treatment Grain refinement Fe-containing phase Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422019159 |
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