Accession Number:

ADB055853

Title:

Research to Conduct an Exploratory Experimental and Analytical Investigation of Alloys

Descriptive Note:

Final rept. Apr 1979-Aug 1980

Corporate Author:

PRATT AND WHITNEY WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Personal Author(s):

• Blackburn, M. J.
• Smith, M. P.

Report Date:

1980-11-01

Pagination or Media Count:

73.0

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.

Descriptors:

• *EXPERIMENTAL DATA
• *PRODUCTION
• *FORGING
• *TITANIUM ALLOYS
• TEST AND EVALUATION
• STRESSES
• MECHANICAL PROPERTIES
• MICROSTRUCTURE
• ALUMINUM ALLOYS
• PROCESSING
• RUPTURE
• HYDROGEN
• OXYGEN
• GAS TURBINES
• MELTING
• CREEP
• RESEARCH MANAGEMENT
• ALUMINIDES

Subject Categories:

• Properties of Metals and Alloys
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE