PLASTIC PROPERTIES AND FRACTURE OF TITANIUM-ALUMINUM ALLOYS.

Abstract

A program of research was conducted to determine the effects of Al content and Ti3Al precipitation o the micro- and macroplastic behavior of Ti-Al alloys, and also to investigate the effects of Al content and Ti3Al on the susceptibility to, and mechanism of, stress corrosion cracking in a methanol - 1.5% HCl environment. The tensile microstrain parameters sigma sub E and sigma sub A increase with Al content. Tests on aged Ti-6 and Ti-8 wt. % Al material indicate that the influence of Ti3Al on the microstrain parameters and flow stress is athermal. Stress corrosion specimens which had been solution treated and quenched failed primarily by intergranular parting. Specimens in the aged condition exhibit a mixture of cleavage fractures and some intergranular parting. It is thought that stress corrosion failure in Ti-Al alloys proceeds as a consequence of anodic dissolution. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1969
Accession Number
AD0712474

Entities

People

  • C. J. Mcmahon Jr.
  • D. J. Truax

Organizations

  • University of Pennsylvania

Tags

DTIC Thesaurus Topics

  • Alcohols
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chemical Compounds
  • Corrosion
  • Environment
  • Material Degradation Processes
  • Materials
  • Methanols
  • Plastic Properties
  • Precipitation
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Titanium

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.