| Ti-40Al-10Fe合金的组织和铸造性能 |
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| 引用本文： | 秦龙飞,黄家硬,苏广才,梁洁,汤宏群,刘宏伟.Ti-40Al-10Fe合金的组织和铸造性能[J].特种铸造及有色合金,2011,31(2):161-163,204. |
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| 作者姓名： | 秦龙飞 黄家硬 苏广才 梁洁 汤宏群 刘宏伟 |
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| 作者单位： | 广西大学材料科学与工程学院 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用氩气保护真空水冷铜坩埚磁悬浮熔炼法制备了Ti-40Al-10Fe(摩尔分数)合金。使用扫描电镜、X射线衍射仪、能谱仪和显微硬度计分析了合金的组织和性能。同时,讨论了Fe对合金的组织和性能的影响。结果表明,合金铸态组织为树枝状晶和少量的等轴晶,主要由γ-TiAl相和τ2相组成;Fe和Al在等轴晶区存在偏析。对Ti-40Al-10Fe和Ti-48Al-10Nb合金的对比试验表明,Ti-40Al-10Fe合金的铸造性能更佳,且消除了缩孔,硬度(HV)达到497,远大于Ti-48Al-10Nb的330。
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| 关 键 词： | TiAl基合金 金属间化合物 显微组织 |
Microstructure and Castability of Ti-40A1-10Fe Alloy |
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| Qin Longfei,Huang Jiaying,Su Guangcai,Liang Jie,Tang Hongqun,Liu Hongwei.Microstructure and Castability of Ti-40A1-10Fe Alloy[J].Special Casting & Nonferrous Alloys,2011,31(2):161-163,204. |
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| Authors: | Qin Longfei Huang Jiaying Su Guangcai Liang Jie Tang Hongqun Liu Hongwei |
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| Affiliation: | Qin Longfei,Huang Jiaying,Su Guangcai,Liang Jie,Tang Hongqun,Liu Hongwei(College of Materials Science and Engineering,Guangxi University,Nanning,China) |
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| Abstract: | Ti-40Al-10Fe(atom percentage)alloy was prepared by vacuum magnetic levitation melting with water-cooling copper crucible under argon atmosphere.Microstructure and properties of the alloy were investigated by SEM(scanning electron microscope),XRD(X-ray diffraction),EDS(energy dispersive spectrometer)and micro-hardness tester.The results show that microstructure of the alloy consists of dendrites and a little equiaxed grain,which is composed of γ-TiAl phase and τ2 phase.There exists segregation of Fe and Al in equiaxed grain zone.Castability of Ti-40Al-10Fe is superior to that of Ti-48Al-10Nb alloy,and absence of shrinkage hole can be observed in the Ti-40Al-10Fe alloy,and its micro-hardness reaches 497(Hv),far away higher than that of Ti-48Al-10Nb alloy(330Hv).Meanwhile,effects of Fe element on the microstructure and properties of the alloy were described. |
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| Keywords: | TiAl Based Alloys Intermetallics Microstructure |
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