偏Hugoniot状态下93钨状态方程  

Equation of State for Tungstun Alloy off-Hugoniot

作　　者：黄海军[1] 聂新卫 冷春蔚[1] 冯磊[1] 胡晓军[1] 罗国强[2] 沈强[2] 王传彬[2] 

机构地区：[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

出　　处：《高压物理学报》2017年第5期541-547,共7页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(41322028;51521001)

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5.02km/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。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 2.12km/s and 5.02km/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 93 W 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.

关 键 词：偏Hugoniot状态方程 多层阻抗梯度飞片 93钨 高温高压 

分 类 号：O347.1[理学—固体力学] O521.22[理学—力学]