Fatigue Crack Propagation in an HSLA Steel (MF-80) in Air and in Salt Water.

Abstract

Fatigue crack propagation was studied in MF-80 HSLA steel in ambient room air and in 3.5 percent NaC1 salt water. Region-II fatigue crack growth rate (da/dN) data were obtained at two load ratios, R=0.10 and R = 0.67. da/dN values were found to be affected by both load ratio and environment, with the greatest effect being caused by the combination of high load ratio and salt water environment. Overall, the results of this study suggest that MF-80 HSLA steel may have slightly less Region-II fatigue crack propagation resistance than other high-strength steels of comparable strength.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 21, 1983
Accession Number
ADA127423

Entities

People

  • S. J. Gill
  • Thomas W. Crooker

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aqueous Solutions
  • Computer Programs
  • Crack Propagation
  • Cracks
  • Dispersion Hardening
  • Environment
  • Fracture (Mechanics)
  • Grain Size
  • Materials
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Resistance
  • Salt Water
  • Test Methods
  • Water
  • Yield Strength

Readers

  • Acoustical Oceanography.
  • Materials Science (Mechanical Engineering).