Dynamic Multiaxial Response of a Hot-Pressed Aluminum Nitride

Abstract

The dynamic multiaxial response of hot-pressed AlN is characterized through quasi-static uniaxial compression, dynamic uniaxial compression and dynamic confined compression experiments within the strain rate range of 10(expn -3) -10(expn 3) s(expn -1). Real-time visualization shows the failure patterns change from axial splitting under uniaxial dynamic compression to shear faulting under confinement. The compressive strength is moderately sensitive to both the confining stress and the loading rate. Post-mortem fracture surface studies show that the dominant fracture mechanism remains transgranular fracture under all loading conditions.

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Document Details

Document Type
Technical Report
Publication Date
Jan 05, 2012
Accession Number
ADA608001

Entities

People

  • C. Q. Chen
  • Guangli Hu
  • J. W. Mccauley
  • K. T. Ramesh

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Nitrides
  • Boundaries
  • Compression
  • Compressive Strength
  • Failure Mode And Effect Analysis
  • Grain Boundaries
  • Materials
  • Mechanical Engineering
  • Military Research
  • Nitrides
  • Phase
  • Phase Transformations
  • Splitting
  • Strain Rate
  • Stresses
  • Visualizations

Readers

  • Geotechnical Engineering.
  • Materials Science (Mechanical Engineering).
  • Mathematics or Statistics