The Duality of Fracture Behavior in a Ca-Based Bulk-Metallic Glass (Postprint)

Abstract

Ca65Mg15Zn20 bulk-metallic glass (BMG) exhibited a typical brittle fracture behavior during compressive loading at room temperature. Samples exploded into many small pieces after elastic deformation and no macroscopic plasticity was observed. The fracture surface demonstrated multiple fracture patterns, including typical metallic-glass vein patterns and glass mirror, mist, and hackle patterns. These observations show that Ca-based BMGs are subjected to multiple brittle fracture modes under compressive loading. Periodic nanoscale corrugations were found in the hackle region, which may indicate local plasticity for the brittle fracture.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2011
Accession Number
ADA617804

Entities

People

  • Daniel B. Miracle
  • Gongyao Wang
  • Oleg N. Senkov
  • Peter K Liaw

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Electron Microscopes
  • Electron Microscopy
  • Glass Transition Temperature
  • Government Procurement
  • Governments
  • Materials
  • Mechanical Properties
  • Metallic Glass
  • Microscopy
  • Modulus Of Elasticity
  • Plastic Properties
  • Shear Bands
  • Shear Modulus
  • Transition Temperature
  • Transitions

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.
  • Surface Coatings Technology.