Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy
Using aberration-corrected scanning transmission electron microscopy, a new fully coherent precipitate platelet designated X′′, with a flexible atomic layer FCC structure, was identified in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy. The emergence of the X′′ phase is primarily attributed to the preferentia...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524002089 |
| _version_ | 1827572207944990720 |
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| author | Qilong Liu Xiwu Li Wei Xiao Zhihui Li Kai Zhu Kai Wen Lizhen Yan Yanan Li Hongwei Yan Yongan Zhang Baiqing Xiong |
| author_facet | Qilong Liu Xiwu Li Wei Xiao Zhihui Li Kai Zhu Kai Wen Lizhen Yan Yanan Li Hongwei Yan Yongan Zhang Baiqing Xiong |
| author_sort | Qilong Liu |
| collection | DOAJ |
| description | Using aberration-corrected scanning transmission electron microscopy, a new fully coherent precipitate platelet designated X′′, with a flexible atomic layer FCC structure, was identified in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy. The emergence of the X′′ phase is primarily attributed to the preferential segregation behavior of Mg and Cu atoms towards the {111}α Ag layers. The strengthening mechanism of the X′′ phase is principally driven by the coherency strengthening, yielding efficient reinforcement (99.8 MPa increment per 1 % volume fraction). After dislocation cutting, the X′′ phase maintains coherence with the matrix, minimizing local strain accumulation at the interface. The mechanical tests show that the alloy with the precipitated X′′ phase, despite its lower strength compared to the alloy with the precipitated Ω phase, exhibits superior ductility and work hardening. The study holds promising implications for designing novel Al-Cu-Mg-Ag alloys with a desirable strength-ductility balance. |
| first_indexed | 2024-04-24T11:22:05Z |
| format | Article |
| id | doaj.art-0d01091fd6a74d0a82365fd77f3ac2f0 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-24T11:22:05Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-0d01091fd6a74d0a82365fd77f3ac2f02024-04-11T04:40:41ZengElsevierMaterials & Design0264-12752024-04-01240112836Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloyQilong Liu0Xiwu Li1Wei Xiao2Zhihui Li3Kai Zhu4Kai Wen5Lizhen Yan6Yanan Li7Hongwei Yan8Yongan Zhang9Baiqing Xiong10State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, China; Corresponding authors at: State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China (X. Li and W. Xiao). General Research Institute for Nonferrous Metals, Beijing 100088, China (Z. Li)State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, China; Corresponding authors at: State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China (X. Li and W. Xiao). General Research Institute for Nonferrous Metals, Beijing 100088, China (Z. Li)State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; General Research Institute for Nonferrous Metals, Beijing 100088, China; Corresponding authors at: State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China (X. Li and W. Xiao). General Research Institute for Nonferrous Metals, Beijing 100088, China (Z. Li)State Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; GRIMAT Engineering Institute Co., LTD., Beijing 101407, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaState Key Laboratory of Non-ferrous Metals and Processes, China GRINM Group Co., LTD., Beijing 100088, China; General Research Institute for Nonferrous Metals, Beijing 100088, ChinaUsing aberration-corrected scanning transmission electron microscopy, a new fully coherent precipitate platelet designated X′′, with a flexible atomic layer FCC structure, was identified in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy. The emergence of the X′′ phase is primarily attributed to the preferential segregation behavior of Mg and Cu atoms towards the {111}α Ag layers. The strengthening mechanism of the X′′ phase is principally driven by the coherency strengthening, yielding efficient reinforcement (99.8 MPa increment per 1 % volume fraction). After dislocation cutting, the X′′ phase maintains coherence with the matrix, minimizing local strain accumulation at the interface. The mechanical tests show that the alloy with the precipitated X′′ phase, despite its lower strength compared to the alloy with the precipitated Ω phase, exhibits superior ductility and work hardening. The study holds promising implications for designing novel Al-Cu-Mg-Ag alloys with a desirable strength-ductility balance.http://www.sciencedirect.com/science/article/pii/S0264127524002089Al-Cu-Mg-Ag alloysPrecipitation characteristicsStrengthening mechanismsFirst-principles calculations |
| spellingShingle | Qilong Liu Xiwu Li Wei Xiao Zhihui Li Kai Zhu Kai Wen Lizhen Yan Yanan Li Hongwei Yan Yongan Zhang Baiqing Xiong Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy Materials & Design Al-Cu-Mg-Ag alloys Precipitation characteristics Strengthening mechanisms First-principles calculations |
| title | Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy |
| title_full | Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy |
| title_fullStr | Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy |
| title_full_unstemmed | Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy |
| title_short | Insights into precipitation characteristics and strengthening mechanisms in a low Cu/Mg ratio Al-Cu-Mg-Ag alloy |
| title_sort | insights into precipitation characteristics and strengthening mechanisms in a low cu mg ratio al cu mg ag alloy |
| topic | Al-Cu-Mg-Ag alloys Precipitation characteristics Strengthening mechanisms First-principles calculations |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524002089 |
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