Fatigue Crack Propagation of Metastable Beta Titanium-Vanadium Alloys.

Abstract

The fatigue crack propagation behavior of three titanium-vanadium alloys (24, 28 and 32 wt.% V) which have (tensile) deformation modes ranging from coarse twinning to wavy and planar slip has been measured in laboratory air and correlated with their low cycle fatigue properties and microstructure. The fatigue crack growth rate of alloys with similar microstructures but different deformation modes, and of alloys with similar deformation modes but different microstructures have been compared. Increasing the deformation barrier mean free path and improving low cycle fatigue properties has been observed to reduce the fatigue crack growth rate at low and intermediate Delta K levels. The fatigue crack growth data have been compared with that calculated from equations which use microstructure and low cycle fatigue parameters. The predictive capability of these equations which contain only measurable parameters has been found to be quite adequate. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 07, 1978
Accession Number
ADA064319

Entities

People

  • Edgar A. Starke Jr.
  • Saghana B. Chakrabortty

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Elements
  • Environment
  • Experimental Data
  • Governments
  • Grain Size
  • Heat Treatment
  • Intensity
  • Materials
  • Mean Free Path
  • Mechanics
  • Titanium
  • United States Government
  • Vanadium Alloys

Fields of Study

  • Materials science

Readers

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