Fatigue Crack Propagation Resistance of Beta-Annealed Ti-6Al-4V Alloys of Differing Interstitial Oxygen Contents

Abstract

Fatigue crack growth rates have been determined for beta-annealed Ti- 6Al-4V alloys with respective oxygen contents of 0.06, 0.11, 0.18, and 0.20 weight percent. For each of these alloys, transitional crack growth behavior has been observed which appears to correlate with a critical value of the reversed plastic zone size: the Widmanstaetten packet size. Moreover, growth rates below transitional levels order in terms of packet size. The present results suggest that interstitial oxygen content and prior beta grain size significantly affect fatigue crack growth rates through control of the Widmanstaetten packet size.

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Document Details

Document Type
Technical Report
Publication Date
Oct 04, 1977
Accession Number
ADA047420

Entities

People

  • George R. Yoder
  • L. A. Cooley
  • Thomas W. Crooker

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Chemical Analysis
  • Computer Programs
  • Crack Propagation
  • Cracks
  • Grain Size
  • Heat Treatment
  • Intensity
  • Materials
  • Mechanical Properties
  • Mechanics
  • Metals
  • Military Research
  • New York
  • Resistance
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Environmental Engineering
  • Materials Science (Mechanical Engineering).