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

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)

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Document Details

Document Type
Technical Report
Publication Date
Nov 28, 1980
Accession Number
ADA093159

Entities

People

  • Eui Whee Lee
  • Saghana B. Chakrabortty

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Alloys
  • Base Lines
  • Chemical Analysis
  • Crack Propagation
  • Crack Tips
  • Hardening
  • Materials
  • Metals
  • Microscopes
  • Microstructure
  • Military Research
  • Residual Stress
  • Residuals
  • Strain Hardening
  • Stresses
  • Vanadium Alloys

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.