Correlation between strain rate sensitivity and α relaxation of metallic glasses | Zendy

M. Zhang | Zendy; Yun-Jiang Wang | Zendy; L.H. Dai | Zendy

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Correlation between strain rate sensitivity and α relaxation of metallic glasses

Author(s) -

M. Zhang,

Yun-Jiang Wang,

L.H. Dai

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4960377

Subject(s) - supercooling , materials science , glass transition , amorphous metal , relaxation (psychology) , strain rate , amorphous solid , modulus , sensitivity (control systems) , elastic modulus , stress relaxation , thermodynamics , condensed matter physics , composite material , polymer , chemistry , crystallography , physics , electronic engineering , psychology , social psychology , creep , alloy , engineering

An inherent correlation between the strain rate sensitivity and α relaxation of metallic glasses (MGs) is observed. This correlation can be attributed to the secondary term which incorporates the nonaffine displacements of atoms in the analytical expression of the elastic modulus of amorphous solids. The observed correlation supports the proposition that stress and temperature play equivalent role in the glass transition of MGs. Besides, an ideal liquid state of MGs is observed in the supercooled liquid region when they are deformed below a critical loading rate. This observation would benefit the application of MGs in the fabrication of micro parts for MEMS (Micro Electro-Mechanical Systems).

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