Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions
查看参考文献16篇
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文摘
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The effects of combined addition of 0.6 wt.% Nd and 0.4 wt.% Y on the microstructure and mechanical properties of Mg-7Zn-3Al alloy were investigated.The results indicated that the Nd and Y addition led to obvious dendrite coarsening.However,it could modify the morphology and distribution of-Mg_(32)(Al,Zn)_(49) intermetallics.Moreover,Al_2REZn_2 phase could be introduced into the alloy with the Nd and Y addition.With the effective second-phase strengthening,the ultimate tensile strength and elongation in as-cast state can be improved by the Nd and Y addition.After ageing treatment,the alloy with the Nd and Y addition exhibited better precipitation strengthening effects by forming finer MgZn_2 and Mg_(32)(Al,Zn)_(49) precipitates into the-Mg matrix.As a result,the yield and ultimate strength of Mg-7Zn3Al-0.6Nd-0.4Y alloy could be increased to 182 and 300 MPa by peak-ageing treatment. |
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来源
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Journal of Rare Earths
,2012,30(5):486-491 【核心库】
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DOI
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10.1016/s1002-0721(12)60077-5
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关键词
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Mg-7Zn-3Al alloy
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microstructure
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mechanical properties
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rare earths
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地址
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1.
Institute of Materials Science and Engineering, Chengdu University of Technology, Chengdu, 610059
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College of Materials Science and Engineering, Shenyang Aerospace University, Shenyang, 110136
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1002-0721 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:4557984
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