Strain rate response of a Ti-based metallic glass composite at cryogenic temperature

J. Bai, H. C. Kou, J. Wang, J. S. Li, R. Hu

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Quasi-static and dynamic deformation behavior of a Ti48Zr 20Nb12Cu5Be15 bulk-metallic-glass composite (BMGC) were investigated at cryogenic temperature (77 K). Results demonstrate that the composite shows good plasticity at quasi-static deformation, but brittle fracture occurs during dynamic deformation. Compared with quasi-static deformation which is insensitive to strain rate, dynamic deformation of the composites exhibits negative strain-rate response that the fracture strength decreases with increasing strain rate. The matrix is believed to dominate the strain-rate response of the present BMGC at cryogenic deformation. Thermal softening due to significant temperature rising in shear band is believed to be responsible for negative strain-rate response during dynamic deformation at cryogenic temperature.

Original languageEnglish
Pages (from-to)228-230
Number of pages3
JournalMaterials Letters
Volume117
DOIs
StatePublished - 15 Feb 2014

Keywords

  • Amorphous materials
  • Composite materials
  • Cryogenic temperature
  • Deformation and fracture
  • Titanium alloy

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