Shear Band Formation in a W-Ni-Fe Alloy Under Plate Impact

Abstract

A thin foil of a W-Ni-Fe alloy, 50-200 micrometers in thickness, is sheared for 2 microseconds under plane wave conditions by plate impact. Shear bands observed show more intensely localized deformations than obtained in other experiments. The responses of the constituent phases, the tungsten grains and the matrix, as well as that of the composite alloy over a strain rate range of 10(exp -4)/s to 7 x 10(exp 5)/s are experimentally obtained and characterized by a viscoplastic model. The effects of strain hardening, thermal softening, material inertia, rate sensitivity, heat conduction and material microscopic inhomogeneity, on dynamic shear localization, are investigated through finite element simulations.... Shear bands, Adiabatic shear bands, WHA, Tungsten heavy alloys, Plate impact, Pressure-shear impact.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1992
Accession Number
ADA260702

Entities

People

  • A. Needleman
  • Meng Zhou
  • R. J. Clifton

Organizations

  • Brown University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Elements
  • Equations
  • Heat Transfer
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Plane Waves
  • Shear Bands
  • Shear Stresses
  • Simulations
  • Strain Hardening
  • Strain Rate
  • Stress Strain Relations
  • Stresses
  • Tungsten

Fields of Study

  • Physics

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.