Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates
Strength and plasticity are basic mechanical properties for wrought Al alloys, and generally exhibit a trade-off relationship. Herein through analyzing the respective effects of precipitates on yield strength and strain hardening, we proposed and quantitatively analyzed a strategy for synchronously...
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Elsevier
2024-12-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524008141 |
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| author | Renjie Dai Zhenjun Zhang Keqiang Li Rui Liu Jiapeng Hou Zhan Qu Baishan Gong Zhefeng Zhang |
| author_facet | Renjie Dai Zhenjun Zhang Keqiang Li Rui Liu Jiapeng Hou Zhan Qu Baishan Gong Zhefeng Zhang |
| author_sort | Renjie Dai |
| collection | DOAJ |
| description | Strength and plasticity are basic mechanical properties for wrought Al alloys, and generally exhibit a trade-off relationship. Herein through analyzing the respective effects of precipitates on yield strength and strain hardening, we proposed and quantitatively analyzed a strategy for synchronously strengthening and plasticizing Al alloys by refining and densifying the precipitates, defined as RDP effect. The precipitates were highly refined and densified in three high-Zn 7xxx alloys in order to verify the validity of the RDP effect. The tensile tests show that the high-Zn Al alloys possess ultra-high strength and good plasticity compared to the traditional Al alloys. Further analysis reveals that the densification of precipitates mainly contributes to the ultra-high strength, accounting for over 75%, while the refinement of precipitates suppresses the dislocation annihilation, thus increasing the strain-hardening capacity. Together, these two factors finally contribute to the excellent strength and plasticity matching. This finding will provide strong support for the positive impact of RDP effect on improving the balance between strength and ductility. Besides, this strategy may be considered as an effective one for simultaneously improving the strength and plasticity in high-performance Al alloys. |
| format | Article |
| id | doaj-art-edb491b8f35d44e1a14651e70fcffc82 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-edb491b8f35d44e1a14651e70fcffc822024-12-21T04:27:28ZengElsevierMaterials & Design0264-12752024-12-01248113439Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitatesRenjie Dai0Zhenjun Zhang1Keqiang Li2Rui Liu3Jiapeng Hou4Zhan Qu5Baishan Gong6Zhefeng Zhang7School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Corresponding authors.ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China; Corresponding authors.Strength and plasticity are basic mechanical properties for wrought Al alloys, and generally exhibit a trade-off relationship. Herein through analyzing the respective effects of precipitates on yield strength and strain hardening, we proposed and quantitatively analyzed a strategy for synchronously strengthening and plasticizing Al alloys by refining and densifying the precipitates, defined as RDP effect. The precipitates were highly refined and densified in three high-Zn 7xxx alloys in order to verify the validity of the RDP effect. The tensile tests show that the high-Zn Al alloys possess ultra-high strength and good plasticity compared to the traditional Al alloys. Further analysis reveals that the densification of precipitates mainly contributes to the ultra-high strength, accounting for over 75%, while the refinement of precipitates suppresses the dislocation annihilation, thus increasing the strain-hardening capacity. Together, these two factors finally contribute to the excellent strength and plasticity matching. This finding will provide strong support for the positive impact of RDP effect on improving the balance between strength and ductility. Besides, this strategy may be considered as an effective one for simultaneously improving the strength and plasticity in high-performance Al alloys.http://www.sciencedirect.com/science/article/pii/S0264127524008141Aluminum alloyStrength and plasticityPrecipitatesStrain-hardeningDislocation annihilation |
| spellingShingle | Renjie Dai Zhenjun Zhang Keqiang Li Rui Liu Jiapeng Hou Zhan Qu Baishan Gong Zhefeng Zhang Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates Materials & Design Aluminum alloy Strength and plasticity Precipitates Strain-hardening Dislocation annihilation |
| title | Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| title_full | Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| title_fullStr | Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| title_full_unstemmed | Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| title_short | Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| title_sort | achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates |
| topic | Aluminum alloy Strength and plasticity Precipitates Strain-hardening Dislocation annihilation |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524008141 |
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