| γ-TiAl合金的显微组织对其蠕变性能的影响 |
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| 引用本文： | 林建国. γ-TiAl合金的显微组织对其蠕变性能的影响[J]. 北京航空航天大学学报, 1998, 24(6): 734-737 |
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| 作者姓名： | 林建国 |
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| 作者单位： | 北京航空航天大学 材料科学与工程系 |
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| 摘 要： | 讨论了γ-TiAl合金显微组织与蠕变性能的关系,并用PST(Polysynthetically Twinned Crystal,简称PST晶体)晶体研究了片层界面相对于外力轴取向对TiAl合金蠕变性能的影响.认为影响该合金蠕变性能的主要显微组织参数是片层取向,γ体积分数,晶粒尺寸,片层宽度以及晶界形貌,并分析了它们与蠕变性能的关系.提出了如何控制以上显微组织参数,使得该合金具有最佳蠕变抗力.
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| 关 键 词： | 钛添加合金 蠕变强度 显微结构 |
| 收稿时间： | 1998-07-02 |
Effects of the Microstructure of γ-TiAl Alloys on the Creep Behavior |
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| Lin Jianguo,Zhang Yonggang,Chen Changqi. Effects of the Microstructure of γ-TiAl Alloys on the Creep Behavior[J]. Journal of Beijing University of Aeronautics and Astronautics, 1998, 24(6): 734-737 |
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| Authors: | Lin Jianguo Zhang Yonggang Chen Changqi |
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| Affiliation: | Beijing University of Aeronautics and Astronautics,Dept. of Materials Science and Engineering |
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| Abstract: | The relationship between microstructure and creep behavior of γ-TiAl alloys was analyzed and discussed, and the effect of the orientation of lamellar boundaries with respect to loading axis on the creep behavior of TiAl alloy with fully lamellar structure was studied by using TiAl PST crystals. It is indicated that the primary microstructure parameters which have important influences on the creep behavior are lamellar orientations with respect to loading axis, volume faction of γ grains, lamellar grain size, lamellar width and grain boundary morphology. The way to get high creep resistance by microstructure control has been suggested. |
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| Keywords: | titanium additions creep resistance microstructure |
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