Yield strength dependence on strain rate of molybdenum-alloy nanofibers | Zendy

Phillip E. Loya | Zendy; Yanzhi Xia | Zendy; Cheng Peng | Zendy; Hongbin Bei | Zendy; P. Zhang | Zendy; J. Zhang | Zendy; E.P. George | Zendy; Yanfei Gao | Zendy; Jun Lou | Zendy

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Yield strength dependence on strain rate of molybdenum-alloy nanofibers

Author(s) -

Phillip E. Loya,

Yanzhi Xia,

Cheng Peng,

Hongbin Bei,

P. Zhang,

J. Zhang,

E.P. George,

Yanfei Gao,

Jun Lou

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4885377

Subject(s) - materials science , strain rate , yield (engineering) , molybdenum , scanning electron microscope , alloy , ultimate tensile strength , strain (injury) , dislocation , composite material , displacement (psychology) , metallurgy , medicine , psychology , psychotherapist

The yield strength dependence on strain rate was studied for molybdenum-alloy nanofibers with varying initialdislocationdensity at three different pre-strain levels.In-situtensile experiments at three displacement rates were carried out in ascanning electron microscope.Yield strength and its scatter decreased as a function of the pre-strain level for different displacement rates. Astatistical modelwas used to analyze the results, and a negative strain rate dependence was inferred from the yield experiments. This finding suggests the need for theoretical investigations since classical models such as dynamic strain aging may have limitations at such nanoscales

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