On the origin of elastic strain limit of bulk metallic glasses

Journal Article · Mon Jan 06 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4861606· OSTI ID:22257086

Cheng, Y. Q. ^[1]

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1. Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

All bulk metallic glasses exhibit a large and almost universal elastic strain limit. Here, we show that the magnitude of the yield strain of the glass state can be quantitatively derived from a characteristic property of the flow state typical in running shear bands (the root cause of yielding). The strain in the shear flow is mostly plastic, but associated with it there is an effective elastic atomic strain. The latter is almost identical for very different model systems in our molecular dynamics simulations, such that the corresponding yield strain is universal at any given homologous temperature.

• OSTI ID: 22257086
• Journal Information: Applied Physics Letters, Vol. 104, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MECHANICAL PROPERTIES
METALLIC GLASSES
MOLECULAR DYNAMICS METHOD
SHEAR
STRAINS