Loading rate effect on the creep behavior of metallic glassy films and its correlation with the shear transformation zone

被引：43
|
作者：
Ma, Y. [1 ]
Ye, J. H. [1 ]
Peng, G. J. [1 ]
Wen, D. H. [1 ]
Zhang, T. H. [1 ]
机构：
[1] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 622卷
基金：
中国国家自然科学基金;
关键词：
Metallic glassy film; Nanoindentation; Creep; Loading rate; Shear transformation zone; INDENTATION CREEP; PLASTIC-FLOW; NANOINDENTATION; DEFORMATION; NANOSCALE; STRENGTH; ALLOY;
D O I：
10.1016/j.msea.2014.11.022
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The room temperature creep behaviors of metallic glassy films with a series of loading rates were systematically investigated by a spherical-tip nanoindentation. The results show that the role of loading rate on the creep deformation is material-dependent and can be intrinsically related to the shear transformation zone (STZ). Smaller STZs facilitate the more dependency of creep on the loading rate and, interestingly, a rate independency was observed in Ni-Nb, whose STZ volume is particularly larger than those in other samples. The deformation mechanism of the creep flow is discussed in the light of STZs combined with extra free volume, providing detailed explanation for the creep diversity on the loading rate in different metallic glass systems. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：76 / 81
页数：6
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