Fatigue Crack Propagation in Titanium Alloys.

Abstract

This Annual Report covers the period Aug. 1, 1976 through Sept. 30, 1977, and deals with the topics fatigue crack initiation and growth in Ti-6Al-4V forging alloy. Subsurface crack initiation has been related to the presence of severe dislocation pile-ups and perhaps to the influence of internal hydrogen. In the fatigue crack growth progress it has been shown that different mechanism are operative in various regions of the da/dN versus delta K plot. The retardation effect associated with overload has been shown to be primarily a surface related effect due to the higher degree of crack closure which exists in the surface regions of a specimen. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1977
Accession Number
ADA049200

Entities

People

  • A. J. Mcevily

Organizations

  • University of Connecticut

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Alloys
  • Biomaterials
  • Connecticut
  • Crack Propagation
  • Dislocations
  • Electron Microscopy
  • Materials
  • Materials Science
  • Metallurgy
  • Overload
  • Retardation
  • Titanium
  • Titanium Alloys
  • Transmission Electron Microscopy
  • Universities

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Technical Research and Report Writing.