Abstract
It was previously reported that the strength of metallic glasses (MGs) would scale inversely with the size of a sample or a deformation field, commonly known as “smaller-being-stronger”. However, based on the extensive spherical nanoindentation experiments conducted across a variety of MGs, we demonstrate that such strength-size scaling breaks down at a critical indenter tip radius, which is caused by the transition of the yielding mechanism from bulk- to surface-controlled shear band initiation. Our experimental findings also provide an explanation for the unusual strength scattering observed in the micro-compression of MGs.
Original language | English |
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Pages (from-to) | 283-287 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 130 |
DOIs | |
Publication status | Published - 15 Mar 2017 |
Keywords
- Metallic glass
- Shear band initiation
- Size scaling
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics