Stress History Effect on Incubation Time for Stress Corrosion Crack Growth in E-4340 HR Steel

Abstract

The effect of stress history on stress corrosion cracking of E-4340 HR steel in an aqueous environment has been studied with the use of double-cantilever beam specimens. The stress history effect was found to influence the incubation time period with changes in the stress intensity. When the stress intensity was decreased, the incubation time period was dependent on the delta K and final K sub f during stress corrosion testing. When the stress intensity was increased, the incubation time period was independent of the applied stress intensity. However, the stress history effect did not influence the steady-state crack growth rates. In this report, the stress history effect is explained by using the hydrogen embrittlement mechanism.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1972
Accession Number
AD0745308

Entities

People

  • Dennis L. Dull
  • Louis Raymond

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Chemical Reactions
  • Corrosion
  • Cracks
  • Embrittlement
  • Environment
  • Failure Mode And Effect Analysis
  • Ferrium
  • Hydrogen Embrittlement
  • Materials
  • Materials Laboratories
  • Steady State
  • Steel
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Stresses
  • United States

Readers

  • Materials Science (Mechanical Engineering).