The Effect of a Thin Diffused Solute Layer on the Nucleation of Fatigue Cracks.

Abstract

Small alterations in the surface conditions of Ti-6Al-4V can have significant effects on the fatigue life. A critical amount of dissolved oxygen near the surface was more effective than diffused aluminum. A combination of solute hardening, twin formation and grain boundary effects seem, at this time, to be the major controlling factor in the surface retardation of the nucleation of fatigue cracks. High vacuum will increase fatigue life greatly. The lifetime in high vacuum appears to be due to the growth of the cracks and not the nucleation process.

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1972
Accession Number
AD0755385

Entities

People

  • Derle M. Snyder
  • Irwin G. Greenfield

Organizations

  • University of Delaware

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Boundaries
  • Fatigue Life
  • Grain Boundaries
  • Hardening
  • High Vacuum
  • Nucleation
  • Retardation
  • Surface Properties
  • Vacuum

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.