Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates
It is still challenging to synchronously improve mechanical properties and corrosion resistance through one strategy during developing Mg alloys. Introducing high-density precipitates is an effective and popular approach to strengthen Mg alloys, while these precipitates generally degrade the corrosi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423018033 |
| _version_ | 1797646748041084928 |
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| author | Bangjun Li Jiapeng Sun An Xu Bingqian Xu Lingling Wang Jie Yuan Guosong Wu |
| author_facet | Bangjun Li Jiapeng Sun An Xu Bingqian Xu Lingling Wang Jie Yuan Guosong Wu |
| author_sort | Bangjun Li |
| collection | DOAJ |
| description | It is still challenging to synchronously improve mechanical properties and corrosion resistance through one strategy during developing Mg alloys. Introducing high-density precipitates is an effective and popular approach to strengthen Mg alloys, while these precipitates generally degrade the corrosion resistance. In this paper, the nanoprecipitates are developed in Mg-13.4Gd-2.2Ag-0.4Zr wt.% cast alloy through the solution and aging treatment for evading this dilemma. Compared with its as-cast counterpart, the peak-aged alloy with high-density nanoprecipitates exhibits enhanced strength, comparable ductility, and improved corrosion resistance. The nanoprecipitates in the peak-aged alloy are composed of β nanoparticles at grain boundaries, and intragranular γ′′ and β′ nanoplates. These nanoprecipitates are contributed to the improved strength through the Orowan mechanism. The β nanoparticles induce weak galvanic corrosion, and the γ′′ nanoplates have not induced visible galvanic corrosion, thus contributing to the enhanced corrosion resistance of the peak-aged alloy. This result suggests that developing nanoprecipitate is a feasible route to collaboratively optimize the mechanical and corrosion properties of the Mg alloys. |
| first_indexed | 2024-03-11T15:07:13Z |
| format | Article |
| id | doaj.art-d846687a62d3453a91f5582254960ce7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:07:13Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-d846687a62d3453a91f5582254960ce72023-10-30T06:03:01ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012614451458Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitatesBangjun Li0Jiapeng Sun1An Xu2Bingqian Xu3Lingling Wang4Jie Yuan5Guosong Wu6College of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCorresponding author.; College of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 221100, PR ChinaIt is still challenging to synchronously improve mechanical properties and corrosion resistance through one strategy during developing Mg alloys. Introducing high-density precipitates is an effective and popular approach to strengthen Mg alloys, while these precipitates generally degrade the corrosion resistance. In this paper, the nanoprecipitates are developed in Mg-13.4Gd-2.2Ag-0.4Zr wt.% cast alloy through the solution and aging treatment for evading this dilemma. Compared with its as-cast counterpart, the peak-aged alloy with high-density nanoprecipitates exhibits enhanced strength, comparable ductility, and improved corrosion resistance. The nanoprecipitates in the peak-aged alloy are composed of β nanoparticles at grain boundaries, and intragranular γ′′ and β′ nanoplates. These nanoprecipitates are contributed to the improved strength through the Orowan mechanism. The β nanoparticles induce weak galvanic corrosion, and the γ′′ nanoplates have not induced visible galvanic corrosion, thus contributing to the enhanced corrosion resistance of the peak-aged alloy. This result suggests that developing nanoprecipitate is a feasible route to collaboratively optimize the mechanical and corrosion properties of the Mg alloys.http://www.sciencedirect.com/science/article/pii/S2238785423018033Mg alloyCorrosionNanoprecipitateMicrostructureHeat treatment |
| spellingShingle | Bangjun Li Jiapeng Sun An Xu Bingqian Xu Lingling Wang Jie Yuan Guosong Wu Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates Journal of Materials Research and Technology Mg alloy Corrosion Nanoprecipitate Microstructure Heat treatment |
| title | Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates |
| title_full | Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates |
| title_fullStr | Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates |
| title_full_unstemmed | Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates |
| title_short | Synchronous improvement in mechanical properties and corrosion resistance of Mg-Gd-Ag-Zr alloy through nanoprecipitates |
| title_sort | synchronous improvement in mechanical properties and corrosion resistance of mg gd ag zr alloy through nanoprecipitates |
| topic | Mg alloy Corrosion Nanoprecipitate Microstructure Heat treatment |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423018033 |
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