The effect of matrix fracture toughness on the plastic deformation of the metallic glassy composite

Zhenhua Chu, Guangyin Yuan, Hidemi Kato, Guoqiang Xie, Dianran Yan

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In the present study, two kinds of bulk metallic glasses (Zr 55Cu30Al10Ni5 and Cu 46Zr42Al7Y5) with high strength and no plastic strain were adopted as matrixes. Both of them were reinforced by ductile crystalline TiNb with the same volume fraction and particle size. The compression results showed that the plastic strain of TiNb/Zr 55Cu30Al10Ni5 composite was higher 292% than that of TiNb/Cu46Zr42Al7Y5 composite. It should be related to the fracture toughness of the glassy matrix. For the glassy matrix with high toughness, the formation of shear bands and micro-crack at the front of the crack reduced the energy of main crack development. It resulted in a large plastic strain. On the other hand, for the brittle metallic glassy matrix, crack developed quickly through the cross section so that no more shear bands was formed. It resulted in the failure of the sample with smaller plastic strain.

Original languageEnglish
Pages (from-to)10-15
Number of pages6
JournalJournal of Alloys and Compounds
Volume612
DOIs
Publication statusPublished - 2014 Nov 5

Keywords

  • Amorphous materials
  • Fracture toughness
  • Notch
  • Particle-reinforced composites
  • Plastic deformation

ASJC Scopus subject areas

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

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