Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy
This study delves into the effects of Al–5Ti–1B–1La intermediate alloy, a newly developed refinement agent, on the microstructure and mechanical properties of A356.2 aluminum-silicon alloy modified by Al–10Sr. The decomposition of Ti2Al20La, where La element was concentrated in the Al–5Ti–1B–1La int...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424006732 |
| _version_ | 1797234357239283712 |
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| author | Guoqing Xia Qian Zhao Xuecheng Ping Yaran Zhang Qilin Yu Zhu Li Qi Cai |
| author_facet | Guoqing Xia Qian Zhao Xuecheng Ping Yaran Zhang Qilin Yu Zhu Li Qi Cai |
| author_sort | Guoqing Xia |
| collection | DOAJ |
| description | This study delves into the effects of Al–5Ti–1B–1La intermediate alloy, a newly developed refinement agent, on the microstructure and mechanical properties of A356.2 aluminum-silicon alloy modified by Al–10Sr. The decomposition of Ti2Al20La, where La element was concentrated in the Al–5Ti–1B–1La intermediate alloy, hardly affected the conventional nucleation mechanism of TiAl3–TiB2; nonetheless, the La element significantly refined the dendritic arms of α-Al. Notably, the secondary dendrite arm spacing was reduced from 49 μm to 27 μm, when 0.025 wt% ∼0.2 wt% Al–5Ti–1B–1La intermediate alloy and 0.014 wt% Al–10Sr modifier was incorporated to the A356.2 aluminum alloy. Although the room-temperature ultimate tensile strength was increased only by 30 MPa, the elongation was remarkably improved from 10% to 26%. The hardness of the alloy was also enhanced from 75 HBW to 84 HBW. The experimental outcomes underscore the efficacy of minimal La element incorporation in enhancing the performance of Al–5Ti–1B intermediate alloy, and the findings are significant for improving the serviceability of automobile wheels made from A356.2 aluminum alloy. The method used in this study can also be employed to regulate the microstructure and enhance mechanical properties of other sub-eutectic aluminum-silicon alloys. |
| first_indexed | 2024-04-24T16:30:47Z |
| format | Article |
| id | doaj.art-b36eea4493cb48ec861b9b8a0728023d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T16:30:47Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b36eea4493cb48ec861b9b8a0728023d2024-03-30T04:39:14ZengElsevierJournal of Materials Research and Technology2238-78542024-05-013014581469Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloyGuoqing Xia0Qian Zhao1Xuecheng Ping2Yaran Zhang3Qilin Yu4Zhu Li5Qi Cai6Tianjin Key Laboratory of Integrated Design and On-Line Monitoring for Light Industry & Food Machinery and Equipment, School of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin, 300222, ChinaTianjin Key Laboratory of Integrated Design and On-Line Monitoring for Light Industry & Food Machinery and Equipment, School of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin, 300222, China; Corresponding author.Tianjin Key Laboratory of Integrated Design and On-Line Monitoring for Light Industry & Food Machinery and Equipment, School of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin, 300222, China; Corresponding author.Department of Physics and Electromagnetic Transport Materials Laboratory, Xingtai University, Xingtai, 054001, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaThis study delves into the effects of Al–5Ti–1B–1La intermediate alloy, a newly developed refinement agent, on the microstructure and mechanical properties of A356.2 aluminum-silicon alloy modified by Al–10Sr. The decomposition of Ti2Al20La, where La element was concentrated in the Al–5Ti–1B–1La intermediate alloy, hardly affected the conventional nucleation mechanism of TiAl3–TiB2; nonetheless, the La element significantly refined the dendritic arms of α-Al. Notably, the secondary dendrite arm spacing was reduced from 49 μm to 27 μm, when 0.025 wt% ∼0.2 wt% Al–5Ti–1B–1La intermediate alloy and 0.014 wt% Al–10Sr modifier was incorporated to the A356.2 aluminum alloy. Although the room-temperature ultimate tensile strength was increased only by 30 MPa, the elongation was remarkably improved from 10% to 26%. The hardness of the alloy was also enhanced from 75 HBW to 84 HBW. The experimental outcomes underscore the efficacy of minimal La element incorporation in enhancing the performance of Al–5Ti–1B intermediate alloy, and the findings are significant for improving the serviceability of automobile wheels made from A356.2 aluminum alloy. The method used in this study can also be employed to regulate the microstructure and enhance mechanical properties of other sub-eutectic aluminum-silicon alloys.http://www.sciencedirect.com/science/article/pii/S2238785424006732A356.2 aluminum alloyIntermediate alloyLa element additionOrganization controlMechanical properties |
| spellingShingle | Guoqing Xia Qian Zhao Xuecheng Ping Yaran Zhang Qilin Yu Zhu Li Qi Cai Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy Journal of Materials Research and Technology A356.2 aluminum alloy Intermediate alloy La element addition Organization control Mechanical properties |
| title | Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy |
| title_full | Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy |
| title_fullStr | Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy |
| title_full_unstemmed | Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy |
| title_short | Effect of Al–5Ti–1B–La intermediate alloy on microstructure and mechanical properties of A356.2 aluminum alloy |
| title_sort | effect of al 5ti 1b la intermediate alloy on microstructure and mechanical properties of a356 2 aluminum alloy |
| topic | A356.2 aluminum alloy Intermediate alloy La element addition Organization control Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424006732 |
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