Low temperature uniform plastic deformation of metallic glasses during elastic iteration

Molecular dynamics simulations and dynamic mechanical analysis experiments were employed to investigate the mechanical behavior of metallic glasses subjected to iteration deformation in a nominally elastic region. It was found that cyclic deformation leads to the formation of irreversible shear tran...

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Bibliographic Details
Published inActa materialia Vol. 60; no. 9; pp. 3741 - 3747
Main Authors Fujita, Takeshi, Wang, Zheng, Liu, Yanhui, Sheng, Howard, Wang, Weihua, Chen, Mingwei
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.05.2012
Elsevier
Subjects
Amorphous materials
Applied sciences
Deformation
Dynamic tests
Elastic deformation
Exact sciences and technology
Heterogeneity
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metallic glasses
Metals. Metallurgy
Plastic deformation
Simulation
Strain
Simulation
Metallic glasses
Plastic deformation
Temperature
Mechanical properties
Amorphous alloy
Low temperature
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Summary:Molecular dynamics simulations and dynamic mechanical analysis experiments were employed to investigate the mechanical behavior of metallic glasses subjected to iteration deformation in a nominally elastic region. It was found that cyclic deformation leads to the formation of irreversible shear transformation zones (STZs) and a permanent uniform strain. The initiation of STZs is directly correlated with the atomic heterogeneity of the metallic glass and the accumulated permanent strain has a linear relation with the number of STZs. This study reveals a new deformation mode and offers insights into the atomic mechanisms of STZ formation and low temperature uniform plastic deformation of metallic glasses.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2012.03.032