Inelastic deformation induced by cyclic nanoindentation in Zr-based bulk metallic glasses

被引：1
|
作者：
Tekaya, A. [1 ]
Labdi, S. [2 ]
Benameur, T. [1 ]
Jellad, A. [1 ]
Aubert, P. [2 ]
Maciejak, O. [2 ]
机构：
[1] ENIM, Lab Genie Mecan LAB MA 05, Ave Ibn El Jazzar, Monastir 5019, Tunisia
[2] Univ Evry Val Essonne, Lab Etudes Milieux Nanomet, F-91025 Evry, France
来源：
MATERIAUX & TECHNIQUES | 2011年 / 99卷 / 04期
关键词：
Metallic glasses; cyclic nanoindentation; inelastic deformation; shear bands; free volume;
D O I：
10.1051/mattech/2011020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Monotonic and cyclic nanoindentation tests were carried out on Zr50Cu40Al10 bulk metallic glass (BMG) at loading rates ranging from 250 to 2500 mu N/s and at ambient temperature. We found that cyclic loadings induced a mechanical softening which appears to be dependent on the number of cycles and the loading rates. The effect of loading rates was compared with the same nanoindentation tests on specimens of Zr-based metallic glass coated with CrN and TiN films. The inelastic deformation on Zr-based metallic glass was studied by analysing the remnant indent morphology using atomic force microscopy. A free-volume mechanism was proposed for interpreting these observations quantitatively.
引用
收藏
页码：471 / 481
页数：11
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