Stress Corrosion Cracking Mechanisms in Martensitic High Strength Steels

Abstract

Delayed failures of martensitic high-strength steels in aqueous environments were studied to determine the effect of environmental and metallurgical variables on the mechanisms of stress corrosion. The effects of chloride content, specimen geometry, and polarization potential on the delayed failure of AISI 4340 (235 and 207 Ksi strength level) and HP 9-4-45 (242 Ksi strength level) steels were evaluated. Incubation time for slow crack growth and crack growth rates were measured at various combinations of applied stress and environment using change of resistance and compliance measurements on precracked center-notch tensile and cantilever loaded notch bend specimens.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0813716

Entities

People

  • E. A. Steigerwald
  • W. D. Benjamin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aqueous Solutions
  • Cantilever Beams
  • Chlorides
  • Classification
  • Corrosion
  • Crack Propagation
  • Failure Mode And Effect Analysis
  • Fast Fractures
  • Ferrium
  • Fracture (Mechanics)
  • Geometry
  • Governments
  • Hydrogen Embrittlement
  • Materials
  • Materials Laboratories
  • Measurement
  • Mechanics
  • Polarization
  • Resistance
  • Steel
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Tensile Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.