High strain rate induced embrittlement of Zr-based bulk metallic glass
来源期刊：中国有色金属学报(英文版)2005年第z2期
论文作者：孙剑飞 严明 沈军
文章页码：115 - 119
Key words：bulk metallic glass； SHPB； high strain rate； embrittlement
Abstract: Quasi-static and high strain rate mechanical behavior of the Zr1.25Ti13.75Ni10Cu12.5Be22.5 bulk metallic glass was determined covering strain rates from 1.02×10-4s-1 to 3.258×103s-1. By use of split hopkinson pressure bar(SHPB) equipment, it is found that the alloy fractures in the high strain rate period with a strength well below that of its quasi-static counterpart and thus a strain rate induced embrittlement happens. Considering the glassy nature of the alloy and with careful analysis of the fracture morphology, dynamic damage accumulated in the high speed deformation period is suggested to be the reason for this embrittlement.
