Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests | Zendy

Tingkun Liu | Zendy; Yanfei Gao | Zendy; Hongbin Bei | Zendy

Open Access

Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests

Author(s) -

Tingkun Liu,

Yanfei Gao,

Hongbin Bei

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4993719

Subject(s) - nanoindentation , materials science , amorphous metal , bending , composite material , plasticity , shear (geology) , residual stress , stress (linguistics) , philosophy , linguistics , alloy

Shear banding dynamics in bulk metallic glasses (BMGs) is manifested by the spatiotemporal evolution of strain fields which in turn depend on structural heterogeneities. The spacing of these heterogeneities, as a characteristic length scale, was determined from the analysis of nanoindentation pop-in tests using a stochastic model. Furthermore, the pre-stress by elastic bending and residual stress by plastic bending of BMG plates were found to dramatically decrease such spacings, thus increasing heterogeneity density and mechanically rejuvenating the glass structure

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