High Shear Strain-Rate Behavior of W-Ni-Fe Tungsten Heavy Alloy Composites as a Function of Matrix Volume Fraction

Abstract

The effect of matrix volume fraction on the high shear strain-rate deformation and failure behavior of W-Ni-Fe heavy alloys is studied using the torsional Hopkinson bar apparatus. High strain-rate tests (at 700/s) were conducted using torsion specimens made from W-Ni-Fe alloys with three different matrix volume fractions. Different matrix volume fractions were obtained by changing the W content in the W-Ni-Fe alloy while keeping W grain size approximately constant. Experimental observations indicate that as the matrix volume fraction is decreased, the strain to failure decreases, at high rates of loading. There were no significant changes seen in the deformation behavior of the three materials at high shear strain-rate loading used in this study.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1998
Accession Number
ADA353925

Entities

People

  • Paul Moy
  • Tusit Weerasooriya

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Crystal Structure
  • Data Acquisition
  • Deformation (Mechanics)
  • Failure Mode And Effect Analysis
  • Geometry
  • Grain Size
  • Materials
  • Mean Free Path
  • Mechanical Properties
  • Mechanical Working
  • Military Research
  • Strain Rate
  • Stress Strain Relations
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Linear Algebra
  • Mechanical Engineering/Mechanics of Materials.