As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium - 文章详情页

作者：

Mao, Jian-Wei (Mao, Jian-Wei.) | Jin, Tou-Nan (Jin, Tou-Nan.) | Xu, Guo-Fu (Xu, Guo-Fu.) | Nie, Zuo-Ren (Nie, Zuo-Ren.) (学者：聂祚仁)

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摘要：

The　effects　of　different　contents　of　rare　earth　element,　and　erbium,　on　the　as-cast　microstructures　of　Al-6Zn-2Mg　and　Al-6Zn-2Mg-1.8Cu　alloys　were　studied　by　optical　microscopy,　scanning　electron　microscopy,　X-ray　diffractometry,　transmission　electron　microscopy　and　EDS　analysis.　The　results　show　that　the　netlike　structure　of　as-cast　alloys　can　be　remarkably　refined,　and　the　distance　of　dendritic　structure　decreases,　with　Er　addition.　However,　the　improvement　results　on　Al-Zn-Mg-Cu　are　not　better　than　that　of　Al-Zn-Mg.　Er　and　Al　can　interact　to　form　Al3Er　phase,　which　is　coherent　with　α(Al)　matrix,　with　trace　Er　addition　to　the　Al-Zn-Mg　alloy.　The　refinement　effect　of　Al-Zn-Mg　alloys　is　familiar　with　the　formation　and　precipitation　of　coherent　Al3Er　phases.　The　ternary　compound　AlCuEr,　similar　with　AlCuSc　phase,　will　form　when　Er　is　added　to　Al-Zn-Mg-Cu　alloy,　which　suppresses　the　formation　of　Al3Er　phase　and　doesn＇t　solve　in　the　following　heat　treatment.

关键词：

Addition reactions Aluminum alloys Casting Copper alloys Erbium Magnesium alloys Microstructure Rare earths Zinc alloys

作者机构：

[ 1 ] [Mao, Jian-Wei]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Jin, Tou-Nan]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Xu, Guo-Fu]School of Materials Science and Engineering, Central South University, Changsha 410083, China
[ 4 ] [Nie, Zuo-Ren]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China

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