Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients
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 similar to 2 mu m 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 ; Corresponding
National Natural Science Foundation of China[
|WOS Research Area|
Materials Science, Multidisciplinary
|WOS Accession No|
|EI Accession Number|
Aluminum Alloys ; Aluminum Corrosion ; Binary Alloys ; Corrosion Resistant Alloys ; Corrosive Effects ; Economic And Social Effects ; Grain Boundaries ; Hardness ; Manganese Alloys ; Microstructure ; Oxide Films ; Surface Treatment
|ESI Classification Code|
Metallurgy And Metallography:531 ; Metals Corrosion:539.1 ; Aluminum:541.1 ; Aluminum Alloys:541.2 ; Manganese And Alloys:543.2 ; Materials Science:951 ; Social Sciences:971
Web of Science
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Mechanical and Energy Engineering|
1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.School of Materials,Sun Yat-sen University,Guangzhou,510006,China
|First Author Affilication||Department of Mechanical and Energy Engineering|
|Corresponding Author Affilication||Department of Mechanical and Energy Engineering|
|First Author's First Affilication||Department of Mechanical and Energy Engineering|
Sun，Qingqing,He，Jing,Chen，Jiabo,et al. Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients[J]. NPJ MATERIALS DEGRADATION,2022,6(1).
Sun，Qingqing.,He，Jing.,Chen，Jiabo.,Chen，Chunhong.,Guo，Xiaokai.,...&Wang，Shuai.(2022).Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients.NPJ MATERIALS DEGRADATION,6(1).
Sun，Qingqing,et al."Hardness and corrosion behavior of an Al-2Mn alloy with both microstructural and chemical gradients".NPJ MATERIALS DEGRADATION 6.1(2022).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.