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Atomic picture of elastic deformation in a metallic glass [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 9,184 : digital, PDF file
Additional Creators
University of Missouri--Columbia, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The tensile behavior of a Ni₆₀Nb₄₀ metallic glass (MG) has been studied by using ab initio density functional theory (DFT) calculation with a large cell containing 1024 atoms (614 Ni and 410 Nb). We provide insight into how a super elastic limit can be achieved in a MG. Spatially inhomogeneous responses of single atoms and also major polyhedra are found to change greatly with increasing external stress when the strain is over 2%, causing the intrinsically viscoelastic behavior. We uncover the origin of the observed super elastic strain limit under tension (including linear and viscoelastic strains) in small-sized MG samples, mainly caused by inhomogeneous distribution of excess volumes in the form of newly formed subatomic cavities.
Report Numbers
E 1.99:1191998
Subject(s)
Note
Published through SciTech Connect.
03/17/2015.
"srep09184"
Scientific Reports 5 3 ISSN 2045-2322 AM
Wang, X.; Aryal, S.; Zhong, C.; Ching, W.; Sheng, H.; Zhang, H.; Zhang, D.; Cao, Q.; Jiang, J.
Funding Information
FE0004007
View MARC record | catkey: 23496913