Pilot Production and Evaluation of Tantalum Alloy Sheet

Autor:	R. T. Begley, R. L. Ammon
Rok vydání:	1963
Předmět:	Materials science Alloy Metallurgy Tantalum Recrystallization (metallurgy) chemistry.chemical_element engineering.material Microstructure Casting Thermal expansion chemistry Ultimate tensile strength engineering Extrusion
DOI:	10.21236/ad0409896
Popis:	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)
Databáze:	OpenAIRE
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