Newtonian flow and phase instability in a bulk metallic glass deformed in the supercooled liquid region

被引：0
|
作者：
Nieh, TG [1 ]
Wadsworth, J [1 ]
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA
来源：
PRICM 4: FORTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, VOLS I AND II | 2001年
关键词：
superplasticity; metallic glasses; Newtonian flow; nanocrystallization;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The deformation behavior of a bulk amorphous Zr-10Al-5Ti-l7.9Cu-14.6Ni alloy was studied in the supercooled liquid region. The alloy exhibits Newtonian behavior at low strain rates but to become non-Newtonian at high strain rates. X-ray diffraction and high-resolution electron microscopy results showed the presence of nanocrystallites in the deformed samples, suggesting the non-Newtonian behavior was actually associated with concurrent crystallization of the amorphous structure during deformation. A mechanistic model based upon structural evolution is offered to explain the observed non-Newtonian behavior.
引用
收藏
页码：2055 / 2056
页数：2
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