| 微量Sc对Mg-7Gd-3Y合金组织及力学性能的影响 |
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| 引用本文： | 刘彪,刘子利,刘细良.微量Sc对Mg-7Gd-3Y合金组织及力学性能的影响[J].特种铸造及有色合金,2009,29(7). |
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| 作者姓名： | 刘彪 刘子利 刘细良 |
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| 作者单位： | 南京航空航天大学材料科学与技术学院 |
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| 摘 要： | 利用光学显微镜、扫描电镜和XRD,分析研究了微量Sc对Mg-7Gd-3Y铸态合金组织及其室温和200℃力学性能的影响.结果表明,在合金中加入0.5%的Sc,促进了Mg24(Y,Gd)5和Mg5(Gd,Y)相的析出,降低Gd在Mg24(Y,Gd)5相中的相对含量,合金的室温和200℃时的抗拉强度分别提高了25 MPa和18 MPa;屈服强度分别提高了28 MPa和22MPa;伸长率分别提高了18.3%和37.8%.
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| 关 键 词： | Mg-7Gd-3Y合金 组织 力学性能 |
Effects of Minor Sc Addition on Microstructure and Mechanical Properties of Mg-7Gd-3Y Alloys |
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| Liu Biao,Liu Zili,Li Xiliang.Effects of Minor Sc Addition on Microstructure and Mechanical Properties of Mg-7Gd-3Y Alloys[J].Special Casting & Nonferrous Alloys,2009,29(7). |
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| Authors: | Liu Biao Liu Zili Li Xiliang |
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| Abstract: | Effects of minor Sc addition on microstruc-ture and mechanical properties of the as-cast Mg-7Gd-3Y alloys at room temperature and at 200℃ were in-vestigated by optical microscope (OM), scanning elec-tron microscope and XRD. The results show that with 0. 5% Sc addition, the alloy at room temperature and at 200℃ is increased by 25MPa and 18MPa in tensile strength and by 28 MPa and 22MPa in yield strength as well as by 18.3% and 30.2% in elongation, respec-tively, as a result of promoting the precipitation of Mg24 (Y, Gd)5 and Mg5 (Gd, Y) phase and decreasing the relative content of Gd in Mg24 (Y, Gd)5 phase. |
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| Keywords: | Sc Mg-7Gd-3Y Alloy So Microstructure Mechanical Properties |
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