Research to Conduct an Exploratory Experimental and Analytical Investigation of Alloys

Abstract

Alloys based on the TiAl (Gamma) and Ti3Al (alpha-two) intermetallic phases have attractive elevated temperature properties for gas turbine applications. However, certain processing and property problems will have to be overcome before such materials are qualified for the projected applications. The current program evaluated processing and heat treatments for three alpha-two and three gamma alloys. The basic compositions were Ti-Al-Nb (V) and Ti-Al-V, respectively. The effect of various interstitial elements, H2, O2 and C were also evaluated. MEchanical properties measured were smooth and notched tensile strength up to 650C (1200F), room temperature notched stress rupture, and creep- rupture over the range 593C (1100F) to 982C (1800F). Test results indicate that useful engineering alloys are evolving in both systems, although melting and processing of the gamma phase alloys is not as advanced as that of alpha-two alloys.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1980
Accession Number
ADB055853

Entities

People

  • M. J. Blackburn
  • M. P. Smith

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Beta Testing
  • Chemistry
  • Engineering
  • Grain Growth
  • Grain Size
  • Heat Treatment
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing
  • Test And Evaluation
  • Test Methods
  • Titanium Alloys
  • Titanium Aluminide
  • Turbines

Fields of Study

  • Materials science

Readers

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