Accession Number : AD0423428

Title :   DISPERSION-STRENGTHENED VANADIUM ALLOYS.

Descriptive Note : Bimonthly rept. no. 5, 14 Aug-13 Oct 63,

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Personal Author(s) : Holtz,F. C.

Report Date : 08 NOV 1963

Pagination or Media Count : 18

Abstract : Vanadium-niobium alloys, dispersion-strengthened by additions of Ti, Zr, or Hf in combination with C, have been prepared by arc-melting. Compositions containing 1 wt-% Hf with small C additions are more difficult to fabricate and have higher recrystallization temperatures than similar alloys containing Zr and C. Short-time creep tests were conducted in 2000 F air on siliconized V-60wt-% N base specimens. At stress levels of 8500 to 8850 psi, creep values of 0.5 to 1.2% were measured in 2 1/2 hours. Some of the specimens retained their room-temperature tensile strength and ductility after stressing at 2000 F. These initial data indicate that V-60wt-%N alloys containing 1wt-% Tu with residual melting stock impurities are more creep resistant at 2000 F than the alloys containing 1wt-% Zr with 0.1 or 0.2wt-% carbon. (Author)

Descriptors :   (*NIOBIUM ALLOYS, DISPERSION), (*VANADIUM ALLOYS, DISPERSION HARDENING), TANTULUM ALLOYS, ADDITIVES, CARBON, OXYGEN, NITROGEN, HAFNIUM, TITANIUM, ZIRCONIUM, MELTING, ELECTRIC ARCS, POWDER, RECRYSTALLIZATION, CREEP, TENSILE PROPERTIES, EXPERIMENTAL DATA, COATINGS, SILIDES, COLD WORKING, HOT WORKING, HARDNESS, STRESSES, RUPTURE, HEAT TREATMENT, ROLLING (METALLURGY), SHEETS, HIGH TEMPERATURE RESEARCH, DUCTILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE