Control of shear band dynamics in Cu50Zr50 metallic glass by introducing amorphous-crystalline interfaces

S. D. Feng, L. Li, K. C. Chan, L. Qi, L. Zhao, L. M. Wang, R. P. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

The effects of interfaces in crystalline Cu/amorphous Cu50Zr50 on shear banding dynamics are investigated using molecular dynamics simulations. The results show that the introduction of amorphous-crystalline interfaces can effectively promote the homogeneous distribution of shear transformation zones (STZs). We found that the high potential energy combined with the defects of the interfaces promote the nucleation of STZs. Further, the amorphous-crystalline interfaces are transition regions that mediate the transmission of dislocations in the crystallites into STZs in the metallic glasses. The accumulation of STZs and dislocations at the interfaces provide the sources for the enhanced plastic deformation in nanocomposites. These results allow us to determine the fundamental atomic structure of amorphous-crystalline interfaces in nanocomposites.

Original languageEnglish
Pages (from-to)896-905
Number of pages10
JournalJournal of Alloys and Compounds
Volume770
DOIs
Publication statusPublished - 5 Jan 2019

Keywords

  • Interface
  • Metallic glass
  • Molecular dynamics simulation
  • Shear band

ASJC Scopus subject areas

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

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