动高压加载下锆基金属玻璃强度测量  

Measurement of strength in a Zr-based bulk metallic glass under dynamic high-pressure loading

作　　者：俞宇颖[1] 习锋[1] 戴诚达[1] 蔡灵仓[1] 谭华[1] 李雪梅[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621999

出　　处：《爆炸与冲击》2014年第1期1-5,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10732010;10972206;11172281);冲击波物理与爆轰物理重点实验室基金项目(9140C6701021102)~~

摘　　要：为了研究Zr51 Ti5 Ni10Cu25Al9 金属玻璃的高压强度特性，进行了平靶冲击实验。采用反向碰撞方式，运用DISAR技术测量金属玻璃样品／LiF窗口界面粒子速度剖面，分析粒子速度剖面获得了37～66GPa压力范围锆基金属玻璃的屈服强度和剪切模量。实验结果表明，在上述压力范围金属玻璃的屈服强度和剪切模量均显示出一定程度的压力硬化效应，分析表明金属玻璃冲击加载波阵面剪应力衰减并非由损伤／破坏或温度软化等因素导致。To investigate the dynamic strength behaviors of a Zr-based bulk metallic glass （BMG）, Zr51Ti5Ni10Cu25Al9 （in atomic percent）, a series of reverse-impact experiments were performed in the peak shock stress range from 37 to 66 GPa. A displacement interferometer system for any reflector （DISAR） was used to measure the particle velocity profiles at the sample/LiF window interface. By analyzing the measured particle velocity profiles, the yield strength and shear modulus of the Zr-based BMG were obtained. The experimental results show that both the yield strength and the shear modu- lus of the Zr-based BMG increase with the increasing of the shock stresses in the stress range consid- ered here. And the shear stress relaxation across the shock wave front of the Zr-based BMG is not due to the shock-induced damage/failure or temperature softening.

关 键 词：固体力学 屈服强度 DISAR 金属玻璃 剪切模量 冲击波 

分 类 号：O346.4[理学—固体力学]