Microstructure, Fracture Characteristics, and Tensile Properties of Two Tungsten Heavy Alloys.

Abstract

The influence of microstructure on fracture behavior and tensile properties was investigated for two tungsten heavy alloys (93W-4.9Ni-2.1Fe and 91W-6Ni-3Co by weight-percentage) that are suitable materiai candidates for use as kinetic energy penetrators. Both alloys were evaluated in swaged and aged conditions. For comparable levels of swaging and aging, the W-Ni-Co alloy exhibited increased tensile strength and ductility compared to the W-Ni-Fe material. The W-Ni-Co alloy had a smaller average W grain size and a larger percentage of W in the matrix. Fracture surfaces of failed uniaxial tensile specimens tested at quasi-static and low-to-medium strain rates were characterized using scanning electron microscopy. The results indicate a strong relationship between microstructure, fracture behavior, and tensile properties as a function of alloy composition and strain rate. (MM)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1995
Accession Number
ADA302046

Entities

People

  • Edward W. Kennedy

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Cold Working
  • Ductility
  • Electron Microscopy
  • Failure Mode And Effect Analysis
  • Grain Size
  • Kinetic Energy
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Microscopy
  • Scanning Electron Microscopy
  • Strain Rate
  • Tensile Properties
  • Tensile Strength
  • Tungsten

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics