The report summarizes the research accomplishments in the first year's program of a study of fatigue crack growth in Ti-6A1-4V alloys. Fatigue crack growth rates have been determined in the mean threshold regions, and data for the effect of mean stress on the threshold level indicate that the dependency may be interpretable in terms of a constraint crack opening criterion. Additional work on high cycle fatigue indicates that there are two regions for the Coffin-Manson relation and that cyclically developed residual stresses may be responsible for this behavior.

  • Corporate Authors:

    University of Connecticut, Storrs

    Department of Metallurgy
    Storrs, CT  United States  06268
  • Authors:
    • McEvily, A J
  • Publication Date: 1975-6-30

Media Info

  • Pagination: 13 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127450
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AFOSR-TR-75-0954 Ann. Rpt.
  • Contract Numbers: AF-AFPSR-2703-74
  • Files: TRIS
  • Created Date: Dec 3 1975 12:00AM