Correlation of Fatigue Crack Growth Rate at Different Stress Ratios for Quenched and Tempered Steels and Other Alloys

Abstract

Measurements of the effect of stress ratio on the constant amplitude fatigue crack growth rates in four quenched and tempered steels in the Paris regime are reported. This data and published data for other alloys (including lower strength steels and non-ferrous alloys) are evaluated, and a correlation function suitable for practical fatigue life calculations is derived. In addition to stress intensity factor range and stress ratio, other significant parameters are the yield stress of the material and its thickness. For the four steels on which new measurements were made, the degree of dependence of the crack growth rate on stress ratio may be related to sensitivity to environmental conditions.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA283803

Entities

People

  • I. M. Robertson

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Amplitude
  • Equations
  • Iron Alloys
  • Materials
  • Measurement
  • Mechanics
  • Residual Stress
  • Residuals
  • Sensitivity
  • Stainless Steel
  • Steel
  • Stress Intensity Factors
  • Thickness
  • Titanium
  • Titanium Alloys
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).