EFFECT OF STRESS ON THE LUEDERS BAND VELOCITY IN LOW CARBON STEELS

Abstract

The Lueders band propagation rate, s sub L, in low carbon steel can be considered to obey the relation, s sub L = s sub zero exp-(H(Tau)/kT) where s sub zero is approximately a constant, and H(Tau) is the activation energy of the process, and represents a decreasing function of the effective stress, Tau (given by the difference between the applied stress and the long-range internal stress). Available data on the effect of stress on Luders band velocity is correlated on the basis of this relationship. The fact that the activation volume derived from this correlation is independent of structure, and is the same as that for dislocation mobility and other deformation phenomena in iron and steel, suggests that the rate-controlling mechanism is thermallyactivated overcoming of the Peierls-Nabarro stress.

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Document Details

Document Type
Technical Report
Publication Date
Jun 04, 1963
Accession Number
AD0407556

Entities

People

  • Hans Conrad

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • California
  • Carbon Steels
  • Dislocations
  • Government Procurement
  • Grain Size
  • Iron
  • Low Temperature
  • Materials
  • Materials Science
  • Plastic Flow
  • Shear Modulus
  • Shear Stresses
  • Steel
  • Strain Rate
  • Stresses
  • United States

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.