New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses

Hu Huang, Minqiang Jiang, Jiwang Yan

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Nanoindentation of a Zr-based metallic glass was performed under various loading rates by using a cube-corner indenter. Experimental results showed that increasing the loading rate from 2 to 20 mN/s, the size of serrated flow was greatly weakened, but the number of serrated flow kept very stable, together with very similar shear band features around the residual indents. These results challenge the current understanding derived from the results obtained by using the Berkovich indenter, and can be well explained by the shear-band propagation dynamics model, i.e., loading rate impeded the propagation of shear band rather than its nucleation.

Original languageEnglish
Article number157587
JournalJournal of Alloys and Compounds
Volume857
DOIs
Publication statusPublished - 2021 Mar 15

Keywords

  • Bulk metallic glass
  • Nanoindentation
  • Serrated flow
  • Shear band

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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