摘要
Quasi-static and high strain rate mechanical behavior of the Zr_ 1.25Ti_ 13.75Ni_ 10Cu_ 12.5Be_ 22.5 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.
Quasi-static and high strain rate mechanical behavior of the Zr_ 1.25Ti_ 13.75Ni_ 10Cu_ 12.5Be_ 22.5 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.
出处
《中国有色金属学会会刊:英文版》
CSCD
2005年第S2期115-119,共5页
Transactions of Nonferrous Metals Society of China