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Microstructures and mechanical properties of al-cu-mn alloy with La and Sm addition

Rare Metals 2012年第4期31卷 332-335页

作者： Chen, Zhongwei Chen, Pei Ma, cuiying State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072ShaanxiPR China

The effect of single addition of La or Sm on the microstructures and mechanical properties of an al-cu-mn alloy were investigated by microstructure characterization and tensile *** results show that addition of La or Sm into the al-cu-mn alloy can remarkably increase the density of θ' phase and refine the microstructure,and thus,improves the mechanical properties at room *** addition results in a more considerable increase in the density and refinement of θ' phase than Sm *** addition has a more significant contribution on the mechanical properties of the al-cu-mn alloy than Sm *** addition,a new phase of al_6cu_6La is formed in the al-cu-mn alloy with La addition.

关键词： microstructure mechanical property al-cu-mn alloy lanthanum samarium

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Effects of minor Y,Zr and Er addition on microstructure and properties of al-5cu-0.4mn alloy

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China Foundry 2017年第6期14卷 461-468页

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

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.

关键词： al-cu-mn alloy T6 heat treatment microstructure mechanical properties

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维普期刊数据库

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HIGH RESOLUTION STUDY OF TWINS IN al_(20)cu_2mn_3 PHASE

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Acta Metallurgica Sinica(English Letters) 1992年第4期5卷 227-230页

作者： LI Chunzhi WANG Shuncai JIN Yan Institute of Aeronautical Materials,Beijing,Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang,China Inst of Aeronautical Materials Beijing China

The dispersoid phase al_(20)cu_2mn_3 in a 2024 al alloy is commonly composed of twins,An ob- servation of corresponding high resolution image shows that the twin boundary plane is a glide plane other than mirror *** neighbouring components of twins are not symmetry of re- flection or rotation,but of glide ***“diamond”glide plane is(101)and the glide vector is(1/4)(-).Components of twins in the phase take shape of prism with the longitudinal edge being parallel to[010]and side faces being{101}and{100}.

关键词： twin glide reflection high resolution image al-cu-mn alloy

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