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

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
Jul 01, 2011
Accession Number
ADA550832

Entities

People

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

Organizations

  • University of Tennessee

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Advanced Materials
  • Air Force
  • Air Force Research Laboratories
  • Chemical Compounds
  • Electron Microscopy
  • Failure Mode And Effect Analysis
  • Glass Transition Temperature
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Metallic Glass
  • Military Research
  • Modulus Of Elasticity
  • Plastic Properties
  • Shear Bands
  • Transitions

Readers

  • Materials Science (Mechanical Engineering).
  • Nanofabrication and Microfabrication.
  • Surface Coatings Technology.