| Ce对Al-Li-Cu-Mg-Ag-Zr合金断裂性能的影响 |
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| 引用本文： | 王景,尹登峰,余鑫祥,崔凡,张洵.Ce对Al-Li-Cu-Mg-Ag-Zr合金断裂性能的影响[J].四川大学学报(自然科学版),2013,50(2):353-358. |
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| 作者姓名： | 王景 尹登峰 余鑫祥 崔凡 张洵 |
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| 作者单位： | 中南大学材料科学与工程学院;中南大学材料科学与工程学院;中南大学材料科学与工程学院;中南大学材料科学与工程学院;中南大学材料科学与工程学院 |
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| 基金项目： | 总装备部重点基金项目(6140506) |
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| 摘 要： | 通过拉伸力学性能测试、Kahn撕裂法研究了Ce对Al-Li-Cu-Mg-Ag-Zr合金力学性能的影响,同时利用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)对合金组织和断口形貌进行了分析,结果表明:合金在180℃下时效后,Ce元素的加入显著提高了合金的强度、塑性及Kahn撕裂韧性.金相显微观察发现:含Ce合金中铸态晶粒细化明显,固溶处理过程中,Ce原子明显抑制了再结晶晶粒的长大,同时在长横方向保留了大量冷加工的纤维组织.Ce的加入使晶界无析出带变窄.并促使了韧窝断裂的发生.
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| 关 键 词： | 稀土铈 Al-Li-Cu合金 Kahn撕裂法 断裂韧性 |
Effect of Ce on the fracture mechanical properties of Al-Li-Cu-Mg-Ag-Zr alloys |
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| WANG Jing,YIN Deng-Feng,YU Xin-Xiang,CUI Fan,ZHANG Xun.Effect of Ce on the fracture mechanical properties of Al-Li-Cu-Mg-Ag-Zr alloys[J].Journal of Sichuan University (Natural Science Edition),2013,50(2):353-358. |
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| Authors: | WANG Jing YIN Deng-Feng YU Xin-Xiang CUI Fan ZHANG Xun |
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| Institution: | School of Materials Science and Engineering,Central South University;School of Materials Science and Engineering,Central South University;School of Materials Science and Engineering,Central South University;School of Materials Science and Engineering,Central South University;School of Materials Science and Engineering,Central South University |
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| Abstract: | The effects of Ce on the mechanical properties of Al-Li-Cu-Mg-Ag-Zr alloys were investigated by tensile test and Kahn tear test. Also, the microstruc ture and fracture morphology were analyzed by optics microscope, transmission electron microscopy and scanning electron microscopy. The results show that the alloys containing Ce have higher tensile strength and elongation than those without containing Ce and the Ce can improve the Kahn tear toughness. The statistics of metallographic shows that the Ce refines the grains of casting and inhibits the recrystallization in long transverse direction. TEM graphs show that Ce narrows the precipitate free zones (PFZ) and the SEM analysis of fracture shows that Ce improves the dimple fracture manner. |
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| Keywords: | cerium Al-Li-Cu alloy Kahn tear test fracture toughness |
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