磁驱动准等熵压缩下LY12铝的强度测量

罗斌强; 王桂吉; 谭福利; 赵剑衡; 孙承纬

doi:10.6052/0459-1879-13-227

磁驱动准等熵压缩下LY12铝的强度测量

中国工程物理研究院流体物理研究所, 四川绵阳 621900

基金项目: 国家自然科学基金（11176002，11272295）和中物院发展基金（2010A0201006）资助项目.

详细信息

作者简介:
赵剑衡，E-mail：jianh_zhao@sina.com

中图分类号: O347.5
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出版历程
- 收稿日期: 2013-07-09
- 修回日期: 2013-09-07
- 刊出日期: 2014-03-17

MEASUREMENT OF DYNAMIC STRENGTH OF LY12 ALUMINUM UNDER MAGNETICALLY DRIVEN QUASI-ISENTROPIC COMPRESSION

Institute of Fluid Physics, CAEP, Mianyang 621900, China

Funds: The project was supported by the National Natural Science Foundation of China (11176002, 11272295) and Science Development Foundation of China Academy of Engineering Physics (2010A0201006).

摘要

摘要: 高压高应变率加载下材料的强度研究一直是冲击动力学的一个难题，目前动态载荷下材料的高压强度测量主要是基于平板撞击技术，冲击温升和应变率效应对材料强度的影响难以分离. 基于小型磁驱动加载装置CQ-4，开展了磁驱动准等熵压缩下LY12 铝的声速和强度测量的实验研究，讨论了考虑加载-卸载过程时磁驱动压缩实验的负载电极设计、实验样品设计、数据处理与分析等内容，并获得了12 GPa 压力范围沿加载-卸载路径的声速变化和峰值压力点的强度数据.
- 准等熵压缩 /
- LY12 铝 /
- 高压声速 /
- 屈服强度
Abstract: It is difficult to fully understand the yield strength of materials under high pressure and high strain rate loading. At present, strength measure under high pressure is mainly based on plate impact technique, in which the effects of strain rate and temperature increase during loading process on material dynamic strength are difficult to resolve. In this work, Lagrangian wave speed and strength of LY12 aluminum under magnetically driven quasi-isentropic compression are studied using CQ-4, a compact strip-line pulsed power generator for isentropic compression experiments. The optimizations of loading electrode and sample configuration, as well as experimental data processing are discussed in detail. Meanwhile, Lagrangian wave speed of LY12 aluminum along loading and unloading path and yield strength under quasi-isentropic compression up to 12GPa are obtained in a good accuracy.
- quasi-isentropic compression /
- LY12 aluminum /
- high pressure wave speed /
- yield strength

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