EFFECT OF PRESTRESSING ON THE STRESS-CORROSION RESISTANCE OF TWO HIGH- STRENGTH STEELS

Abstract

Precracked, single-edge-notched specimens of 4340 steel (194-ksi yield strength) and 18% Ni maraging 300 steel were prestressed in laboratory air to various percentages (0% to 90%) of K sub Ic and then unloaded. The times to failure were subsequently determined in 3.5% aqueous NaCl solution as a function of initial stress intensity. Prestressing increased the threshold stress intensity K sub Iscc of the 4340 steel, but had only a slight effect on the K sub Iscc of the maraging steel. The times to failure of both steels at initial stress-intensity levels above K sub Iscc were unaffected by prestress. The prestressing effects are attributed to the presence of compressive stresses at the crack tip.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1970
Accession Number
AD0711606

Entities

People

  • Clive S. Carter

Organizations

  • Boeing Commercial Airplanes

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Corrosion
  • Corrosion Resistance
  • Crack Tips
  • Cracks
  • Ferrium
  • Intensity
  • Maraging Steels
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Prestressing
  • Resistance
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Stresses
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.