Plastic Flow and Failure Resistance of Metallic Glass: Insight from In Situ Compression of Nanopillars

Abstract

We report in situ nanocompression tests of Cu-Zr-Al metallic glass MG pillars in a transmission electron microscope. This technique is capable of spatially and temporally resolving the plastic flow in MGs. The observations reveal the intrinsic ability of fully glassy MGs to sustain large plastic strains, which would otherwise be preempted by catastrophic instability in macroscopic samples and conventional tests. The high ductility in volume-limited MGs and the sample size effects in suppressing the rapid failure common to MGs are analyzed by modeling the evolution of the collectivity of flow defects toward localization.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 14, 2008
Accession Number
ADA519167

Entities

People

  • A. M. Minor
  • C. L. Warren
  • E. Ma
  • Ju Li
  • S. A. Asif
  • Y. Q. Cheng
  • Z. W. Shan

Organizations

  • University of Pennsylvania

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Compression
  • Crystals
  • Electron Microscopes
  • Electron Microscopy
  • Engineering
  • Flow
  • Glass Transition Temperature
  • Materials
  • Materials Science
  • Metallic Glass
  • Microscopes
  • Plastic Deformation
  • Plastic Flow
  • Plastic Properties
  • Resistance
  • Shear Bands
  • Transition Temperature

Readers

  • Nanoscale Plasmonic Nanotechnology
  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics