Effect of external disturbances on the strain-rate dependent plastic deformation behavior of a bulk metallic glass

S. H. Chen, Tai Man Yue, Chi Pong Tsui, Kang Cheung Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

In this work, the effect of external disturbances on the strain-rate dependent plastic deformation behavior of a Zr57Cu20Al10Ni8Ti5bulk metallic glass (BMG) has been examined by tailoring the geometric confinement, stress gradient, and sample size. With the external disturbances, the fracture strains of the BMG specimens become less dependence on the strain rates, and it is found that the confinement of the propagation of shear bands is the dominant deformation mechanism. This is different from previous findings in that multiplication of the shear bands also plays a critical role in accommodating the plastic deformation of BMGs with external disturbances. The present findings not only shed more light on the deformation mechanisms of BMGs under external disturbances, but also suggest that the use of external disturbances can reduce the dependence of the plastic deformation behavior of BMGs on the strain rates.
Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalMaterials Science and Engineering A
Volume669
DOIs
Publication statusPublished - 4 Jul 2016

Keywords

  • Bulk metallic glass
  • Geometric confinement
  • Plastic deformation
  • Shear bands
  • Stress gradient

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this