Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients
Abstract An Al–2Mn binary alloy with gradient microstructure and chemistry near its surface was fabricated by combining surface mechanical treatment and post-ageing treatment. TEM results indicate that the minimum grain size of the topmost surface layer is below 100 nm. As revealed by SIMS results,...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-08-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-022-00274-w |
| _version_ | 1811342729963110400 |
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| author | Qingqing Sun Jing He Jiabo Chen Chunhong Chen Xiaokai Guo Fahe Cao Shuai Wang |
| author_facet | Qingqing Sun Jing He Jiabo Chen Chunhong Chen Xiaokai Guo Fahe Cao Shuai Wang |
| author_sort | Qingqing Sun |
| collection | DOAJ |
| description | Abstract An Al–2Mn binary alloy with gradient microstructure and chemistry near its surface was fabricated by combining surface mechanical treatment and post-ageing treatment. TEM results indicate that the minimum grain size of the topmost surface layer is below 100 nm. As revealed by SIMS results, Mn is depleted in the surface layer with ~2 μm in thickness, which is due to the “short-circuit” diffusion along grain boundaries and dislocation pipes. Microhardness and corrosion testing results revealed that both hardness and corrosion resistance increase substantially with this gradient design. XPS and Mott–Schottky results demonstrate that the oxide film of the gradient Al–Mn alloy is thinner and denser than that of the coarse-grained sample. Our design method of obtaining gradient distribution both in microstructure and chemistry near metal surface lights a pathway for overcoming the trade-off between properties such as strength and corrosion in 3000 series Al alloys. |
| first_indexed | 2024-04-13T19:15:53Z |
| format | Article |
| id | doaj.art-b80f619dd01c47319782a0d8f58f7da6 |
| institution | Directory Open Access Journal |
| issn | 2397-2106 |
| language | English |
| last_indexed | 2024-04-13T19:15:53Z |
| publishDate | 2022-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj.art-b80f619dd01c47319782a0d8f58f7da62022-12-22T02:33:40ZengNature Portfolionpj Materials Degradation2397-21062022-08-01611910.1038/s41529-022-00274-wHardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradientsQingqing Sun0Jing He1Jiabo Chen2Chunhong Chen3Xiaokai Guo4Fahe Cao5Shuai Wang6Department of Mechanical and Energy Engineering, Southern University of Science and TechnologyDepartment of Mechanical and Energy Engineering, Southern University of Science and TechnologySchool of Materials, Sun Yat-sen UniversitySchool of Materials, Sun Yat-sen UniversitySchool of Materials, Sun Yat-sen UniversitySchool of Materials, Sun Yat-sen UniversityDepartment of Mechanical and Energy Engineering, Southern University of Science and TechnologyAbstract An Al–2Mn binary alloy with gradient microstructure and chemistry near its surface was fabricated by combining surface mechanical treatment and post-ageing treatment. TEM results indicate that the minimum grain size of the topmost surface layer is below 100 nm. As revealed by SIMS results, Mn is depleted in the surface layer with ~2 μm in thickness, which is due to the “short-circuit” diffusion along grain boundaries and dislocation pipes. Microhardness and corrosion testing results revealed that both hardness and corrosion resistance increase substantially with this gradient design. XPS and Mott–Schottky results demonstrate that the oxide film of the gradient Al–Mn alloy is thinner and denser than that of the coarse-grained sample. Our design method of obtaining gradient distribution both in microstructure and chemistry near metal surface lights a pathway for overcoming the trade-off between properties such as strength and corrosion in 3000 series Al alloys.https://doi.org/10.1038/s41529-022-00274-w |
| spellingShingle | Qingqing Sun Jing He Jiabo Chen Chunhong Chen Xiaokai Guo Fahe Cao Shuai Wang Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients npj Materials Degradation |
| title | Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients |
| title_full | Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients |
| title_fullStr | Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients |
| title_full_unstemmed | Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients |
| title_short | Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients |
| title_sort | hardness and corrosion behavior of an al 2mn alloy with both microstructural and chemical gradients |
| url | https://doi.org/10.1038/s41529-022-00274-w |
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