The Effect of Strain Rate and Temperature on Yielding in Steels

Abstract

The effect of elastic strain rates ranging from 0.001 to 10/sec and temperatures ranging from 200K (-100F) to 590K (600F) on the yield strength of several steels is reported. The steels utilized are a 1018 mild steel, 4340 steel, H-11 tool steel and 300 grade maraging steel. The results are interpreted in terms of the Cottrel-Bilby yielding model based on release of dislocations from locking carbon atmospheres. The results for all of the materials except the maraging steel are consistent with this model if it is modified to account for re-locking of dislocations by migration of carbon atoms. The maraging steel shows a constant strain rate sensitivity at a constant temperature, over the range of strain rates investigated. This rate sensitivity decreases with increasing temperature and at 590K (600 F) a decreasing strength with increasing strain rate is found. This is attributed to stress aging effects. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1970
Accession Number
AD0717303

Entities

People

  • David P. Kendall

Tags

Communities of Interest

  • C4I
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Carbon Alloys
  • Elastic Properties
  • Equations
  • Maraging Steels
  • Materials
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Plastic Explosives
  • Steel
  • Strain Gages
  • Strain Rate
  • Stresses
  • Temperature Gradients
  • Tool Steel
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.