Effects of Microstructural Modification on Titanium Toughness and Fatigue,

Abstract

Some effects of microstructure and chemical composition on the toughness and fatigue characteristics of titanium alloys after various heat treatments are described. The present studies were conducted on Ti-6Al-4V and Ti-6Al-6V-2Sn plate and forging in the mill annealed and recrystallized annealed conditions. It was generally observed that fracture toughness (K sub Ic) was improved by recrystallization annealing heat treatments and that lower alpha stabilizing contents (i.e., Al, O, N, C) and grain coarsening were associated with higher K sub Ic values. A similar trend for fatigue crack growth for these materials may have increased sensitivity to differences in microstructure and chemistry at low stress intensities during fatigue loading. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1974
Accession Number
AD0785409

Entities

People

  • James Kennedy

Organizations

  • Grumman

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Alloys
  • Annealing
  • Chemical Composition
  • Chemistry
  • Heat Energy
  • Heat Treatment
  • Intensity
  • Materials
  • Microstructure
  • Recrystallization
  • Sensitivity
  • Titanium
  • Titanium Alloys
  • Toughness

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Structural Health Monitoring of Composite Structures.