Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation
A high-performance Mg-10Gd-4Dy-1.5Ag-1Zn-0.5Zr (wt.%, EQ142X) alloy was designed by multi-element composite addition in this work, obtaining a high yield strength (~396 MPa) and ultimate tensile strength (~451 MPa) after hot extrusion and ageing. The high strength is mainly related to fine grains an...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/7/1219 |
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| author | Jinshu Xie Jinghuai Zhang Shujuan Liu Zihao You Zhi Zhang Tengfei Zhao Xiaobo Zhang Ruizhi Wu |
| author_facet | Jinshu Xie Jinghuai Zhang Shujuan Liu Zihao You Zhi Zhang Tengfei Zhao Xiaobo Zhang Ruizhi Wu |
| author_sort | Jinshu Xie |
| collection | DOAJ |
| description | A high-performance Mg-10Gd-4Dy-1.5Ag-1Zn-0.5Zr (wt.%, EQ142X) alloy was designed by multi-element composite addition in this work, obtaining a high yield strength (~396 MPa) and ultimate tensile strength (~451 MPa) after hot extrusion and ageing. The high strength is mainly related to fine grains and nano-precipitates, especially the latter. <i>β</i>′ and <i>γ</i>″ nano-precipitation with high fractions are the main strengthening phases, leading to a strengthening increment of ~277 MPa. Moreover, the multi-element alloying in this study promotes the basal-prismatic network strengthening structure, composed of <i>β</i>′ nano-precipitation with (1-210) habit planes, <i>γ</i>″ nano-precipitation with (0001) habit planes, basal plane stacking faults and 14H-long period stacking ordered phase. In addition, the dislocations and fine grains introduced by the hot-extrusion process not only accelerate the precipitation rate of nanostructure and thus improve the ageing hardening efficiency, but also facilitate the formation of more uniform and finer nano-precipitation. Thus, it is proposed that introducing nano-precipitates network into fine-grained structure is an effective strategy for developing high-strength Mg alloys. |
| first_indexed | 2024-03-11T05:28:54Z |
| format | Article |
| id | doaj.art-94ac29dc68bc461cb7654ad98d56e3a4 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T05:28:54Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-94ac29dc68bc461cb7654ad98d56e3a42023-11-17T17:17:24ZengMDPI AGNanomaterials2079-49912023-03-01137121910.3390/nano13071219Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-PrecipitationJinshu Xie0Jinghuai Zhang1Shujuan Liu2Zihao You3Zhi Zhang4Tengfei Zhao5Xiaobo Zhang6Ruizhi Wu7Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaDepartment of Materials Physics and Chemistry, Harbin Institute of Technology, Harbin 150001, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaJiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing 211167, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaA high-performance Mg-10Gd-4Dy-1.5Ag-1Zn-0.5Zr (wt.%, EQ142X) alloy was designed by multi-element composite addition in this work, obtaining a high yield strength (~396 MPa) and ultimate tensile strength (~451 MPa) after hot extrusion and ageing. The high strength is mainly related to fine grains and nano-precipitates, especially the latter. <i>β</i>′ and <i>γ</i>″ nano-precipitation with high fractions are the main strengthening phases, leading to a strengthening increment of ~277 MPa. Moreover, the multi-element alloying in this study promotes the basal-prismatic network strengthening structure, composed of <i>β</i>′ nano-precipitation with (1-210) habit planes, <i>γ</i>″ nano-precipitation with (0001) habit planes, basal plane stacking faults and 14H-long period stacking ordered phase. In addition, the dislocations and fine grains introduced by the hot-extrusion process not only accelerate the precipitation rate of nanostructure and thus improve the ageing hardening efficiency, but also facilitate the formation of more uniform and finer nano-precipitation. Thus, it is proposed that introducing nano-precipitates network into fine-grained structure is an effective strategy for developing high-strength Mg alloys.https://www.mdpi.com/2079-4991/13/7/1219magnesium alloysageingnano-precipitationmechanical properties |
| spellingShingle | Jinshu Xie Jinghuai Zhang Shujuan Liu Zihao You Zhi Zhang Tengfei Zhao Xiaobo Zhang Ruizhi Wu Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation Nanomaterials magnesium alloys ageing nano-precipitation mechanical properties |
| title | Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation |
| title_full | Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation |
| title_fullStr | Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation |
| title_full_unstemmed | Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation |
| title_short | Developing Mg-Gd-Dy-Ag-Zn-Zr Alloy with High Strength via Nano-Precipitation |
| title_sort | developing mg gd dy ag zn zr alloy with high strength via nano precipitation |
| topic | magnesium alloys ageing nano-precipitation mechanical properties |
| url | https://www.mdpi.com/2079-4991/13/7/1219 |
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