Accession Number:

AD0275158

Title:

DEVELOPMENT OF TANTALUM-TUNGSTEN ALLOYS FOR HIGH PERFORMANCE PROPULSION SYSTEM COMPONENTS

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH CORP CAMBRIDGE MASS

Personal Author(s):

• DOUGLASS,R.W.

Report Date:

1962-03-20

Pagination or Media Count:

1.0

Abstract:

Seven carburized Ta-W alloy MERM nozzles have been shipped to Aerojet-General Corporation for test firing, completing the planned MERM nozzle series. a-10 nd 15W alloy ARC nozzles have been carburized. The carburizing furnace design has been improved to permit 9-hr exposures an available furnace has been modified for the carburizing of test samples at 2500 C. Ta-15 and 30W alloys were successfully upset forged at 3500 and 4000 F to provide stock for sheet rolling and test samples. Electron microprobe analysis of carburized Ta alloys shows that Hf s gregates to the carbide phases, while W seems to segregate to the matrix. T SE ARE PRELIMINARY RESULTS BASED ON TRENDS SHOWN IN THE RAW DATA. W additions in carburized Ta increase the rate of C pickup and increase dimensional changes during carburization. W also results in changes in the relative abundance of carbide phases and the morphology of the carbide phases. Author

Descriptors:

• *ROCKET NOZZLES
• *TANTALUM ALLOYS
• *TUNGSTEN ALLOYS
• ALLOYS
• CARBIDES
• FORGING
• HAFNIUM ALLOYS
• MECHANICAL PROPERTIES
• MICROSTRUCTURE
• PHASE STUDIES
• PHYSICAL PROPERTIES
• PROCESSING
• SHEETS
• TANTALUM COMPOUNDS
• TENSILE PROPERTIES
• TUNGSTEN COMPOUNDS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE