Intrinsic size effects in the mechanical response of taper-free nanopillars of metallic glass

被引：98

作者：

Chen, Chang Qiang ^{[1
,4
]}

Pei, Yu Tao ^{[1
]}

Kuzmin, Oleksii ^{[1
]}

Zhang, Zhe Feng ^{[2
]}

Ma, Evan ^{[3
]}

De Hosson, Jeff Th M. ^{[1
]}

机构：

[1] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

[2] Chinese Acad Sci, IMR, Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[3] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

[4] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 18期

关键词：

ENHANCED PLASTICITY; DEFORMATION;

D O I：

10.1103/PhysRevB.83.180201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Both quantitative stress-strain curves and in situ transmission electron microscope observations demonstrate intrinsically strong sample size effects on the deformation mode of taper-free metallic glass pillars. With the pillar diameter gradually decreasing from 640 to 70 nm, the deformation mode evolves from (i) highly localized and catastrophic shear banding to, (ii) initially nonlocalized deformation developing toward stop-and-go shear banding accompanied by softening, (iii) apparently homogeneous and banding-less deformation but with intermittent shear events, and eventually (iv) fully homogeneous and smooth plastic flow.

引用

页数：4

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