Plastic flow and failure resistance of metallic glass: Insight from in situ compression of nanopillars

被引：150

作者：

Shan, Z. W. ^{[1
,4
]}

Li, J. ^{[2
]}

Cheng, Y. Q. ^{[3
]}

Minor, A. M. ^{[4
]}

Asif, S. A. Syed ^{[1
]}

Warren, O. L. ^{[1
]}

Ma, E. ^{[3
]}

机构：

[1] Hysitron Inc, Minneapolis, MN 55344 USA

[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[3] Johns Hopkins Univ, Baltimore, MD 21218 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.77.155419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report in situ nanocompression tests of Cu-Zr-Al metallic glass (MG) pillars in a transmission electron microscope. This technique is capable of spatially and temporally resolving the plastic flow in MGs. The observations reveal the intrinsic ability of fully glassy MGs to sustain large plastic strains, which would otherwise be preempted by catastrophic instability in macroscopic samples and conventional tests. The high ductility in volume-limited MGs and the sample size effects in suppressing the rapid failure common to MGs are analyzed by modeling the evolution of the collectivity of flow defects toward localization.

引用

页数：6

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