The breakdown of strength size scaling in spherical nanoindentation and microcompression of metallic glasses

S. Wang, Y. F. Ye, Q. Wang, San-Qiang Shi, Y. Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)283-287
Number of pages5
JournalScripta Materialia
Volume130
DOIs
Publication statusPublished - 15 Mar 2017

Keywords

  • Metallic glass
  • Shear band initiation
  • Size scaling

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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