| TC17钛合金在高温与高应变率下的动态压缩力学行为研究 |
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| 引用本文： | 牛秋林,陈明,明伟伟. TC17钛合金在高温与高应变率下的动态压缩力学行为研究[J]. 中国机械工程, 2017, 28(23): 2888 |
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| 作者姓名： | 牛秋林 陈明 明伟伟 |
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| 作者单位： | 1.湖南科技大学机电工程学院，湘潭,4112012.上海交通大学机械与动力工程学院,上海,2002403.湖南科技大学难加工材料高效精密加工湖南省重点实验室，湘潭,411201 |
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| 基金项目： | 国家自然科学基金资助项目(51405294,51605161,51675204)National Natural Science Foundation of China （No. 51405294,51605161,51675204） |
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| 摘 要： | 采用微型分离式霍普金森压杆实验系统对TC17钛合金在高温、高应变率条件下的动态力学行为进行研究，测试材料的应力应变行为，分析实验温度、应变率和应变对其动态力学性能的影响规律。实验结果表明：当应变率为3000s-1时，TC17钛合金表现出明显的应变硬化效应，但在高温、高应变率条件下其应变硬化效应明显减弱;TC17钛合金具有应变率强化效应，但在温度升高过程中其应变率敏感性随着实验温度的升高而先减小后增大;实验温度对TC17钛合金的动态压缩力学行为的影响非常明显，温度敏感性因子随温度的升高大幅度增大。
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| 关 键 词： | 材料力学 动态压缩力学行为 分离式霍普金森压杆 TC17钛合金 高应变率 |
Study on Dynamic Compressive Mechanics Behavior of TC17 Titanium Alloy at High Temperature and High Strain Rates |
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| NIU Qiulin,CHEN Ming,MING Weiwei. Study on Dynamic Compressive Mechanics Behavior of TC17 Titanium Alloy at High Temperature and High Strain Rates[J]. China Mechanical Engineering, 2017, 28(23): 2888 |
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| Authors: | NIU Qiulin CHEN Ming MING Weiwei |
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| Affiliation: | 1.College of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan，Hunan,4112012.School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai,2002403.Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan,Hunan,411201 |
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| Abstract: | The dynamic mechanics behaviors of TC17 titanium alloy were studied under the conditions of high temperatures and high strain rates by using SHPB experimental system. The stress and strain behaviors of the materials were tested, and the effects of the experimental temperatures, strain rates and strains on the dynamic mechanics properties were analyzed. The experimental results show that when the strain rate is as 3000s-1, TC17 titanium alloy exhibits obvious strain hardening effects, but the strain hardening effects are weakened at high temperatures and high strain rates. TC17 titanium alloy has strain rate strengthening effect, but during the temperature increase processes, the strain rate sensitivity decreases firstly and then increases with the temperature increase. The effects of temperature on the dynamic compressive mechanics behaviors of TC17 titanium alloy are very obvious, and the temperature sensitivity factor increases with the temperature increase. |
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| Keywords: | mechanics of materials dynamic compressive mechanics behavior split Hopkinson pressure bar(SHPB) TC17 titanium alloy high strain rate |
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