Accession Number : AD0275158

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

Corporate Author : NATIONAL RESEARCH CORP CAMBRIDGE MASS

Personal Author(s) : DOUGLASS,R.W.

Report Date : 20 MAR 1962

Pagination or Media Count : 1

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE