Accession Number:

ADA093159

Title:

The Effect of Overload on Fatigue Crack Propagation in Metastable Beta Titanium-Vanadium Alloys.

Descriptive Note:

Technical rept.,

Corporate Author:

GEORGIA INST OF TECH ATLANTA FRACTURE AND FATIGUE RESEARCH LAB

Report Date:

1980-11-28

Pagination or Media Count:

39.0

Abstract:

The crack retardation response due to single- and multiple-cycle overload of two titanium vanadium alloys 24 and 32 wt. pct. V has been studied. It has been observed that the degree of retardation depends upon the vanadium content of the alloy, the load ratio, the number of overload cycles and the magnitude of the peak load. Fractographic observations show that the cracking mode may be changed in the overload affected zone from that in the preoverload region. These results seem to incidcate that the retardation behavior is mainly due to the compressive residual stresses arising as a consequence of the overload. The degree of retardation depends not only on the loading variables, but also on the material parameters like the monotonic and cyclic deformation behavior, and the stress-strain response. Author

Subject Categories:

  • Metallurgy and Metallography
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE