Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy
A novel Mg-Nd-Sm-Zn-Zr alloy with promising age-strengthening effects has been successfully developed to meet the urgent needs of lightweight in the aerospace industry. The precipitation behavior and elastic properties of the nano-precipitates in the alloy have been revealed using transmission elect...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423033409 |
| _version_ | 1797338264979374080 |
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| author | Chaosheng Zhang Sicong Zhao Jingfang Li Yicheng Feng Lei Wang Zhiwei Wang Erjun Guo |
| author_facet | Chaosheng Zhang Sicong Zhao Jingfang Li Yicheng Feng Lei Wang Zhiwei Wang Erjun Guo |
| author_sort | Chaosheng Zhang |
| collection | DOAJ |
| description | A novel Mg-Nd-Sm-Zn-Zr alloy with promising age-strengthening effects has been successfully developed to meet the urgent needs of lightweight in the aerospace industry. The precipitation behavior and elastic properties of the nano-precipitates in the alloy have been revealed using transmission electron microscopy and first-principles calculation. The Guinier-Preston (GP) zones, lamellar γ′ precipitates, and granular β′ precipitates formed in the α-Mg matrix after aging at 190 °C for 3 h (under-aging stage). Notably, the alloy reached the peak-aging stage and achieved an excellent ultimate tensile strength of 266 MPa after aging for 18 h. These precipitates further transformed into the lamellar β′ and β1 precipitates, and the enclosed nano-strengthening structure was constructed by γ′, β′ and β1 precipitates. The precipitation sequence of the aged alloy was determined as the supersaturated solid solution (SSSS) → GP zones → β′/γ′ → β1. First-principles calculations and 3D visualization approach demonstrated that the addition of mixed light RE elements can effectively improve the elastic modulus and reduce the elastic anisotropy of β′ nano-precipitates. The Young's modulus (E), shear modulus (G), and anisotropy index (AU) of β′-Mg7(Nd,Sm) precipitates were 48.38 MPa, 18.79 MPa and 2.29, respectively. This study provides a theoretical and experimental basis for further research and development of novel high-performance Mg-light RE alloys. |
| first_indexed | 2024-03-08T09:28:31Z |
| format | Article |
| id | doaj.art-0de817267bc24f28a4d8ad627b971802 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:31Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0de817267bc24f28a4d8ad627b9718022024-01-31T05:44:23ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012833853395Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloyChaosheng Zhang0Sicong Zhao1Jingfang Li2Yicheng Feng3Lei Wang4Zhiwei Wang5Erjun Guo6Key Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China; Corresponding author.Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China; Corresponding author.Key Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, ChinaAECC Harbin Dongan Engine Co., Ltd., Harbin, 150000, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China; Corresponding author.A novel Mg-Nd-Sm-Zn-Zr alloy with promising age-strengthening effects has been successfully developed to meet the urgent needs of lightweight in the aerospace industry. The precipitation behavior and elastic properties of the nano-precipitates in the alloy have been revealed using transmission electron microscopy and first-principles calculation. The Guinier-Preston (GP) zones, lamellar γ′ precipitates, and granular β′ precipitates formed in the α-Mg matrix after aging at 190 °C for 3 h (under-aging stage). Notably, the alloy reached the peak-aging stage and achieved an excellent ultimate tensile strength of 266 MPa after aging for 18 h. These precipitates further transformed into the lamellar β′ and β1 precipitates, and the enclosed nano-strengthening structure was constructed by γ′, β′ and β1 precipitates. The precipitation sequence of the aged alloy was determined as the supersaturated solid solution (SSSS) → GP zones → β′/γ′ → β1. First-principles calculations and 3D visualization approach demonstrated that the addition of mixed light RE elements can effectively improve the elastic modulus and reduce the elastic anisotropy of β′ nano-precipitates. The Young's modulus (E), shear modulus (G), and anisotropy index (AU) of β′-Mg7(Nd,Sm) precipitates were 48.38 MPa, 18.79 MPa and 2.29, respectively. This study provides a theoretical and experimental basis for further research and development of novel high-performance Mg-light RE alloys.http://www.sciencedirect.com/science/article/pii/S2238785423033409Mg-RE alloysAging treatmentPrecipitation behaviorMechanical propertiesFirst-principles calculation |
| spellingShingle | Chaosheng Zhang Sicong Zhao Jingfang Li Yicheng Feng Lei Wang Zhiwei Wang Erjun Guo Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy Journal of Materials Research and Technology Mg-RE alloys Aging treatment Precipitation behavior Mechanical properties First-principles calculation |
| title | Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy |
| title_full | Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy |
| title_fullStr | Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy |
| title_full_unstemmed | Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy |
| title_short | Precipitation behavior and mechanical properties of Mg-Nd-Sm-Zn-Zr alloy |
| title_sort | precipitation behavior and mechanical properties of mg nd sm zn zr alloy |
| topic | Mg-RE alloys Aging treatment Precipitation behavior Mechanical properties First-principles calculation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423033409 |
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