"Plastic flow and failure resistance of metallic glass: Insight from <e" by Z. W. Shan, Ju Li et al.

Departmental Papers (MSE)

Title

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

Author(s)

Z. W. Shan, Hysitron, Inc.
Ju Li, University of Pennsylvania
Y. Q. Cheng, Johns Hopkins University
A. M. Minor, Lawrence Berkeley National Laboratory
S. A. Syed Asif, Hysitron, Inc.
O. L. Warren, Hysitron, Inc.
E. Ma, Johns Hopkins University

Document Type

Journal Article

Date of this Version

April 2008

Comments

Copyright American Physical Society. Reprinted from Physical Review B, Volume 77, Article 155419, April 2008, 6 pages.
Publisher URL: http://dx.doi.org/10.1103/PhysRevB.77.155419

Abstract

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.

Keywords

aluminium alloys, compressive testing, copper alloys, ductility, metallic glasses, plastic flow, size effect, transmission electron microscopy, zirconium alloys

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