Accession Number : AD0437174

Title :   PILOT PRODUCTION AND EVALUATION OF TANTALUM ALLOY SHEET.

Descriptive Note : Quarterly rept. no. 7, 15 Nov 63 to 15 Feb 64,

Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA ASTRONUCLEAR LAB

Personal Author(s) : Ammon,R. L. ; Begly,R. T.

Report Date : 15 APR 1964

Pagination or Media Count : 35

Abstract : The evaluation of T-222 (Ta-9.6W-2.4Hf-0.01C) sheet was continued with emphasis on the properties of a second heat of the alloy. The tensile and stress-rupture properties as well as the weld bend ductility of the second heat were superior to those of the first heat of T-222 produced. The evaluation of other TaW-Hf alloys showed that increasing the solute concentration of T-222 from 12 to 14% resulted in a substantial increase in 2400 F tensile strength while producing only a slight improvement at 3000 F. Increasing the carbon content of T-222 from 0.01 to 0.04% resulted in no significant change in mechanical properties. The substitution of nitrogen for carbon in T-222 produced no significant difference in properties. In a phase identification study, Ta2C and a complex FCC phase were identified, and their presence in T-222 was correlated with mechanical and thermal treatments. (Author)

Descriptors :   (*TANTALUM ALLOYS, MECHANICAL PROPERTIES), (*MATERIAL FORMING, TANTALUM ALLOYS), CARBON ALLOYS, HAFNIUM ALLOYS, TUNGSTEN ALLOYS, WELDS, HIGH TEMPERATURE, DUCTILITY, TENSILE PROPERTIES, STRESSES, RUPTURE, PHASE STUDIES, CHEMICAL ANALYSIS, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE