The characterization of plastic deformation in Ce-based bulk metallic glasses

被引：20

作者：

Zhang, L. C.

Wei, B. C. ^{[1
]}

Xing, D. M.

Zhang, T. H.

Li, W. H.

Liu, Y.

机构：

[1] Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Inst Mech, Stae Key Lab Nonlinear Mech, Beijing 100080, Peoples R China

来源：

INTERMETALLICS | 2007年 / 15卷 / 5-6期

基金：

中国国家自然科学基金;

关键词：

glasses; metallic; plastic deformation mechanisms; creep;

D O I：

10.1016/j.intermet.2006.10.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The plastic deformation behavior of Ce68Al10Cu20Nb2 and Ce70Al10Cu20 bulk metallic glasses (BMGs) at room temperature was studied by depth-sensing nanoindentation and microindentation. It is shown that the two BMGs exhibit a continuous plastic deformation without distinct serration at the all of the studied loading rates during nanoindentation. An obvious creep displacement was observed during the holding-load segment at the maximum load for the two alloys, and the magnitude of creep during holding-load increases with loading rate. The subsurface plastic deformation zone of the two BMGs after indentation at various loading rates was investigated through bonded interface technique using depth-sensing microindentation. A highly developed shear banding pattern can be observed in the plastic deformation region, though the global load-depth curves illuminate a "homogeneous flow". The plastic deformation behavior of the Ce-based BMGs during indentation measurements is discussed in terms of localized viscous flow. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：791 / 795

页数：5

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