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Effects of minor Y,Zr and Er addition on microstructure and properties of Al-5Cu-0.4Mn alloy

Effects of minor Y,Zr and Er addition on microstructure and properties of Al-5Cu-0.4Mn alloy

作     者:Feng Zhang Ting-biao Guo Qi Li Chen Wang Wan-wu Ding Qing-lin Li 

作者机构:State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Nonferrous Alloys and Processing of Ministry of Education Lanzhou 730050 China 

出 版 物:《China Foundry》 (中国铸造(英文版))

年 卷 期:2017年第14卷第6期

页      面:461-468页

核心收录:

学科分类:08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 

基  金:financially supported by the Gansu Province Science and Technology Major Special Program Foundation of China(Grant No.1302GKDA015) 

主  题:Al-Cu-Mn alloy T6 heat treatment microstructure mechanical properties 

摘      要:The effect of different contents of Y, Zr and Er on microstructure and properties of Al-5 Cu-0.4 Mn alloy was investigated. T6 heat treatment, OM, SEM and EDS methods were applied to the alloy. The results showed that fluidity and elongation of alloy adding Y, Zr and Er were improved, while with the increase of addition amounts, θ phase increased and grains were trended to grow up gradually. The Al-5 Cu-0.4 Mn alloy presented the maxed style of ductile and brittle fracture. After T6 heat treatment, the precipitation amounts of θ phase decreased dramatically and tensile strength and hardness significantly increased. Especially when addition contents were among 0.1-0.3 wt.%, tensile strength and hardness of heat-treated alloy increased greatly, almost doubled as that of the as-cast state. The tensile strength reached its maximum of 378.43 MPa when the addition amount was 0.3 wt.%. With the further increase of addition amounts, the elongation deteriorated and the proportion of ductile fracture reduced due to the limited dispersion strengthening effect of θ phase and Al_8Cu_4 Er. It demonstrated that addition of 0.1-0.3 wt.% Y, Zr and Er would generate positive effects and influences on Al-5 Cu-0.4 Mn alloy, which is significant for optimizing components and improving properties of Al-5 Cu-0.4 Mn alloy.

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