偏Hugoniot状态下93钨状态方程

黄海军; 聂新卫; 冷春蔚; 冯磊; 胡晓军; 罗国强; 沈强; 王传彬

doi:10.11858/gywlxb.2017.05.006

偏Hugoniot状态下93钨状态方程

doi: 10.11858/gywlxb.2017.05.006

1.
武汉理工大学理学院，湖北武汉 430070
2.
武汉理工大学材料复合新技术国家重点实验室，湖北武汉 430070

基金项目:

国家自然科学基金 41322028

国家自然科学基金 51521001

详细信息

作者简介:
黄海军(1976—)，男，博士，教授，主要从事高温高压凝聚态物理、固体地球物理研究.E-mail:hjhuang@whut.edu.cn

中图分类号: O347.1;O521.22
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出版历程
- 收稿日期: 2016-04-13
- 修回日期: 2016-06-28

Equation of State for Tungstun Alloy off-Hugoniot

1.
College of Science, Wuhan University of Technology, Wuhan 430070, China
2.
State Key Labatory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 利用动高压实验装置二级气体炮和5层阻抗梯度飞片，在2.12和5.02 km/s的碰撞速度下测量了93钨样品的自由面速度，同时基于冲击波理论对实验测量的自由面速度进行了解读。高温高压下93钨的偏Hugoniot状态方程分析表明，在较低的碰撞速度下多次压缩后93钨的压强和温度要高于单次Hugoniot压缩的压强和温度，而在较高的碰撞速度下截然相反，其主要原因是93钨在多次加载过程中Hugoniot参数和相对压缩性发生了变化。
- 偏Hugoniot状态方程 /
- 多层阻抗梯度飞片 /
- 93钨 /
- 高温高压
Abstract: Using a two-stage light gas gun and FPGWI (flier-plates with graded wave impedance), the free surface velocities of 93 tungsten alloy (93W) were measured at the impact velocities of 2.12 km/s and 5.02 km/s respectively and the experimental data were analyzed based on the shock wave theory.The results show that at a low impact velocity the pressures and temperatures of 93W alloy after repeated shock compression are higher than those after a single shock compression, and that at a high impact velocity the reverse is true.The phenomenon is results from the change of the Hugoniot parameters and the volume stress after multiple compressions.
- equation of state off-Hugoniot /
- flier-plate with graded wave impedance /
- 93 tungsten alloy /
- high pressure and temperature

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图 1 二层阻抗梯度飞片击靶过程波系分析

Figure 1. x-t diagram of waves in the flyers and the target

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图 2 碰撞速度为2.12 km/s时实验测量自由面速度与理论计算结果的比较

Figure 2. Comparison of the free surface velocity from experiment with those from calculation at an impact velocity of 2.12 km/s

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图 3 碰撞速度为5.02 km/s时实验测量自由面速度与理论计算结果的比较

Figure 3. Comparison of the free surface velocity from experiment with those from calculation at an impact velocity of 5.02 km/s

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图 4 在高压下93钨应力和应变的关系

Figure 4. Stress and volume strain for 93 W under high pressure

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图 5 不同碰撞速度下多次冲击加载应力p_H，n与Hugoniot应力p_H差随应变的变化趋势

Figure 5. Variation of stress along the curves of off-Huongiot and Huogniot for 93W

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图 6 93钨样品的Hugoniot冲击温度以及在不同碰撞速度下的准等熵压缩温度

Figure 6. Impact temperature of 93W under Hugoniot and the quasi-isentropic states at various velocities

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表 1 计算所用参数

Table 1. Parameters used in this work

Material	ρ₀/(g/cm³)	C₀/(km/s)	λ	γ
MB₂	1.776^[12]	4.570^[12]	1.210^[12]	1.63^[13]
Al	2.698^[12]	5.328^[12]	1.338^[12]	2.18^[13]
TC4	4.430^[14]	4.927^[14]	1.093^[14]	1.33^[13]
Cu	8.932^[15]	3.933^[15]	1.500^[15]	1.97^[13]
93W	17.600^[16]	4.008^[16]	1.277^[16]	1.78^[13]

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参考文献(16)

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