| 稀土元素Y对Mg-Nd-Zn-Zr合金组织和高温力学性能的影响 |
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| 引用本文： | 刘娟,夏长清,张志高. 稀土元素Y对Mg-Nd-Zn-Zr合金组织和高温力学性能的影响[J]. 矿冶工程, 2008, 28(4): 94-97 |
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| 作者姓名： | 刘娟 夏长清 张志高 |
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| 作者单位： | 中南大学材料科学与工程学院,湖南,长沙,410083;中南大学材料科学与工程学院,湖南,长沙,410083;中南大学材料科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 制备了Mg-5.0Y-3.0Nd-0.5Zn-0.5Zr 和Mg-3.0Nd-0.5Zn-0.5Zr 2种合金, 研究了Y元素和Nd元素对合金组织和高温力学性能的影响。通过XRD分析了合金的物相组成进行了定性分析。稀土元素Nd在Mg-Nd-Zn-Zr合金中以Mg12Nd相存在于铸态组织晶界, Nd、Y在Mg-Y-Nd-Zn-Zr中以Mg41Nd5和Mg24Y5相存在于铸态组织晶界。这些相均具有很好的耐热性, 是主要的强化相。研究结果表明, Y对合金铸态组织有明显细化作用。合金挤压轧制后经过T6处理后进行高温拉伸, 与Mg-3.0Nd-0.5Zn-0.5Zr相比, 加Y的Mg-5.0Y-3.0Nd-0.5Zn-0.5Zr合金的抗拉强度和延伸率明显提高。300 ℃的抗拉强度达到了168.5 MPa, 延伸率为28.8%。
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| 关 键 词： | 镁合金 显微组织 稀土元素 高温力学性能 |
| 收稿时间： | 2008-02-24 |
Effect of Y on Microstructure and High Temperature Mechanical Properties of Mg-Nd-Zn-Zr Alloys |
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| LIU Juan,XIA Chang-qing,ZHANG Zhi-gao. Effect of Y on Microstructure and High Temperature Mechanical Properties of Mg-Nd-Zn-Zr Alloys[J]. Mining and Metallurgical Engineering, 2008, 28(4): 94-97 |
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| Authors: | LIU Juan XIA Chang-qing ZHANG Zhi-gao |
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| Affiliation: | School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China |
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| Abstract: | Two alloys of Mg-5.0Y-3.0Nd-0.5Zn-0.5Zr and Mg-3.0Nd-0.5Zn-0.5Zr were prepared.The effect of elements of Y and Nd on microstructure and high temperature mechanical properties of the alloys was researched.The alloy phases were analyzed by X-ray diffraction(XRD).The element Nd exists as Mg12Nd in the grain boundaries with cast structure in Mg-Nd-Zn-Zr alloys,while Nd and Y as Mg41Nd5 and Mg24Y5 respectively in the grain boundaries with cast structure in the alloys.These phases are the main strengthening phase... |
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| Keywords: | magnesium alloy microstructure rare earth element high temperature mechanical property |
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