| 高应变率下TiC_P/Ti复合材料的动态拉伸性能 |
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| 引用本文： | 姜芳,李艳洁,宁建国.高应变率下TiC_P/Ti复合材料的动态拉伸性能[J].固体力学学报,2011(Z1). |
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| 作者姓名： | 姜芳 李艳洁 宁建国 |
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| 作者单位： | 北京林业大学工学院;北京理工大学爆炸与冲击国家重点实验室; |
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| 基金项目： | 国家自然科学基金(No.90305018)资助项目; 北京林业大学优秀青年教师科技创新项目(YX2010-6) |
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| 摘 要： | 采用旋转盘式杆-杆型动态拉伸试验机对TiCP颗粒增强钛基复合材料及其基体钛合金的动态拉伸性能进行了研究.同时为了比较,在MTS810试验机上做了两种材料的准静态试验.试验结果表明,复合材料及基体材料屈服后至材料的迅速失效,几乎没有应变硬化效应;复合材料的抗拉强度和屈服强度较基体明显提高,但延性明显下降;钛合金基体和复合材料均有明显的应变率强化效应,但复合材料的应变率强化效应明显高于基体;建立了复合材料率相关的本构关系.最后从位错等微观角度分析了复合材料的强化机理、复合材料的应变率敏感性以及复合材料应变率敏感性高于基体的原因.
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| 关 键 词： | TiCP复合材料 动态拉伸性能 高应变率 位错 |
TENSILE PROPERTIES OF TIC_P/TI COMPOSITE AT HIGH STRAIN RATE |
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| Fang Jiang Yanjie Li Jianguo Ning.TENSILE PROPERTIES OF TIC_P/TI COMPOSITE AT HIGH STRAIN RATE[J].Acta Mechnica Solida Sinica,2011(Z1). |
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| Authors: | Fang Jiang Yanjie Li Jianguo Ning |
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| Institution: | Fang Jiang1 Yanjie Li2 Jianguo Ning3(1School of Technology,Beijing Forestry of University,Beijing,100083)(2School of Technology,liyanjie.Beijing,100083)(3State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,100081) |
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| Abstract: | A material testing system(MTS810) and a split Hopkinson tension bar(SHTB) are utilized in the research on the quasi-static and dynamic tensile behavior of a titanium alloy reinforced with a 3% by volume fraction of TiC particles(TP650) and of an unreinforced the titanium alloy matrix.The strain rates range from 0.0001s-1 to 1300s-1.The composite exhibits increased stiffness,tensile strength and yield relative to the matrix but decreased its plasticity.The experimental results show that both the TiCp/Ti comp... |
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| Keywords: | TiCP particle-reinforced titanium matrix composite dynamic tensional properties high rates of strain dislocation |
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