Deformation behavior of bulk metallic glasses under a mixed-mode (I/II) loading condition

S. H. Chen, A. Domel, T. M. Yue, C. P. Tsui, K. C. Chan, K. A. Dahmen, P. K. Liaw

Research output: Contribution to journalArticle

Abstract

Bulk metallic glasses (BMGs) demonstrate different deformation behavior under varying loading conditions. In the present work, a Zr57Cu20Al10Ni8Ti5 (atomic percent, at.%) BMG was subjected to a mixed-mode (I/II) loading condition by tailoring double-side notches. The findings show stable plastic-flow plateau stages in the loading-displacement curves, and this phenomenon is different from other notched BMG specimens with predominant-mode-I failure. More importantly, due to the stress concentrations between two notches, most of the slip events with large load drops occur on the fracture plane, resulting in a wide smooth region consisting of several shear steps on the fracture surface. We show that despite different deformation behavior, the specimens still display slip-size statistics of the plastic flow, which are similar to those seen in compression tests. The present findings give more insight into the deformation behavior/mechanisms of BMGs under varying loading conditions for practical structural applications.

Original languageEnglish (US)
Pages (from-to)148-154
Number of pages7
JournalIntermetallics
Volume93
DOIs
StatePublished - Feb 2018

Keywords

  • Bulk metallic glass
  • Deformation behavior
  • Loading condition
  • Stress gradient

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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