Microstructure, mechanical and corrosion properties of 5E61 alloy - 文章详情页

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The　microstructure　of　Al-6Mg-0.9Mn-0.07Zr-0.2Er　(wt.%),　registered　as　5E61　alloy,　were　investigated　using　optical　microscopy,　scanning　electron　microscopy　and　transmission　electron　microscopy.　The　results　showed　that　the　addition　of　0.2　wt.%　Er　can　refine　the　dendritic　structure　and　form　fine　and　coherent　L12　structured　Al3(ErxZr1-x)　precipitates　in　the　alloy.　After　a　two-stage　homogenization　(280/10h,　460/36h),　the　recrystallization　temperature　of　the　alloy　with　0.2　wt.%　Er　is　about　15　higher　than　that　of　the　alloy　without　Er.　The　better　recrystallization　resistance　may　be　related　to　the　Al3(ErxZr1-x)　precipitates,　which　can　pin　on　dislocations　and　sub-grain　boundaries.　The　hardness　of　the　cold-rolled　alloy　with　0.2　wt.%　Er　is　143HV,　which　is　5%　higher　than　the　alloy　without　Er.　The　exfoliation　corrosion　and　nitric　acid　mass　loss　test　were　also　performed.　The　exfoliation　corrosion　of　the　alloy　is　N　grade,　and　the　mass　loss　is　only　9.84mg/cm2.　©　2017　Trans　Tech　Publications,　Switzerland.

关键词：

Aluminum alloys Aluminum metallography Cold rolling Corrosion Corrosive effects Erbium Erbium alloys Exfoliation (materials science) Grain boundaries High resolution transmission electron microscopy Intergranular corrosion Magnesium alloys Magnesium metallography Manganese alloys Manganese metallography Mechanical properties Metal cladding Microstructure Recrystallization (metallurgy) Scanning electron microscopy Zircaloy Zirconium metallography

作者机构：

[ 1 ] [Liu, Pei Liang]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Wu, Xiao Lan]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Wen, Sheng Ping]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Huang, Hui]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Gao, Kun Yuan]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Nie, Zuo Ren]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China

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