Plastic deformation of Zr-based bulk metallic glasses under nanoindentation

被引：37
|
作者：
Liu, L [1 ]
Chan, KC
机构：
[1] Huazhong Univ Sci & Technol, Dept Mat Sci & Engn, State Key Lab Die & Mould Technol, Wuhan 430074, Peoples R China
[2] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Hong Kong, Hong Kong, Peoples R China
来源：
MATERIALS LETTERS | 2005年 / 59卷 / 24-25期
基金：
中国国家自然科学基金;
关键词：
bulk metallic glasses; plastic deformation; nanoindentation;
D O I：
10.1016/j.matlet.2005.05.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The plastic deformation of two Zr-based bulk metallic glasses (BMGs), Zr55Cu30Ni5Al10 and Zi(69.5)Cu(12)Ni(11)Al(7.5), was investigated by instrumented nanoindentation over a broad range of loading rates. It was found that the plastic flow of the two BMGs exhibited conspicuous serrations at low loading rates. The serrations, however, became less prominent as the rate of indentation increased. AFM showed a significant pile-up of materials around the indents, indicating that a highly localized plastic deformation occurred under nanoindentation. The mechanism governing the plastic deformation in BMGs was tentatively discussed in terms of the mode of strain-induced free volume. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：3090 / 3094
页数：5
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