Effects of trace Zr on the microstructure and properties of 2E12 alloy

查看全文 作　　者：WANG [1]Jianzhao;FANG [1]Canfeng;HAO [1]Hai;WANG [1]Shaohua;YANG [2]Shoujie;DAI [2]Shenglong;ZHANG [1]Xingguo

机构地区：[1]School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;[2]Beijing Institute of Aeronautical Materials, Beijing 100095, China

出　　处：《Rare Metals》索引2009年第28卷第5期,共5页

摘　　要：Al-4.0Cu-1.4Mg-0.6Mn (2E12) and Al-4.0Cu-1.4Mg-0.6Mn-0.3Zr aluminum billets were manufactured by soft-contact electromagnetic continuous casting (EMC). Subsequent forging and heat treatment were conducted and the effects of Zr on the microstructure and properties of the Al-4.0Cu-1.4Mg-0.6Mn alloy were studied. The results show that the addition of 0.3% Zr can reduce the dendrite and refine grains. During forging and solution treatment, fine and dispersive Al3Zr particles precipitated from the supersaturated α (Al) solid solution in the heating process of the billet can effectively pin dislocations and subgrain boundaries. Because of the addition of Zr, the mechanical properties are improved with the tensile strength, yield strength, elongation, and contraction of the area increasing by 5.4%, 11.3%, 9.7%, and 12.6%, respectively. Moreover, under the condition of R = 0.1, the fatigue crack growth rate (da/dN) of the Al-4.0Cu-1.4Mg-0.6Mn-0.3Zr alloy is lower than that of the Al-4.0Cu-1.4Mg-0.6Mn alloy. 关键词：力学性能锆合金微观结构 AL3ZR 疲劳裂纹扩展速率软接触电磁连铸显微组织影响规律

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Effects of trace Zr on the microstructure and properties of 2E12 alloy

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