| 工业纯钛动态压缩特性及破坏的实验研究 |
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| 引用本文： | 付应乾,董新龙. 工业纯钛动态压缩特性及破坏的实验研究[J]. 稀有金属材料与工程, 2016, 45(1): 102-106 |
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| 作者姓名： | 付应乾 董新龙 |
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| 作者单位： | 宁波大学,宁波大学 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目）;国家教育部博士点基金 |
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| 摘 要： | 用分离式霍普金森压杆对TA2工业纯钛进行了动态压缩及绝热剪切破坏实验研究,得到了不同应变率和不同温度下的宏观应力-应变曲线。通过对压缩本构特性及微观金相破坏的比较分析,讨论了应变率、表观压缩本构特性对绝热剪切形成的影响。结果显示:TA2试样动态压缩呈现绝热剪切破坏特征,绝热剪切带在空间呈对称的双锥形状;应变率越高,形成绝热剪切带的临界应变越小;分析表明,动态压缩实验无法得到关于绝热剪切起始、发展过程的本构软化信息。
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| 关 键 词： | 固体力学；Ta2钛金属；动态压缩；绝热剪切 |
| 收稿时间： | 2014-01-30 |
| 修稿时间： | 2014-03-11 |
Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression |
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| Fu Yingqian and Dong Xinlong. Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression[J]. Rare Metal Materials and Engineering, 2016, 45(1): 102-106 |
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| Authors: | Fu Yingqian and Dong Xinlong |
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| Affiliation: | Ningbo University,Ningbo University |
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| Abstract: | Pure titanium TA2 alloy was tested by Split Hopkinson Pressure Bar (SHPB) under uniaxial dynamic compression conditions with different strain rates and room temperatures. Adiabatic shear bands were found in the specimens by metallographic after compression tests. As a result, we found strain and strain rate were so important for the initiation of shear bands. A critical strain must be arrived when the shear bands occur, and the larger strain rate, the smaller critical strain. |
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| Keywords: | solid mechanics pure titanium ta2 SHPB adiabatic shear bands |
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