DISPERSION-STRENGTHENED VANADIUM ALLOYS. Bimonthly Report No. 3, April 14, 1963-June 13, 1963

Technical Report · Tue Jul 16 04:00:00 EDT 1963

OSTI ID:4682010

Holtz, F C

Studies of dispersion-strengthening mechanisms in vanadium -niobium base alloys are described. Arc-melted alloys bascd on V-60 wt% Nb and V-40 wt% Nb-30 wt% Ta, with hafnium or zirconium and carbon, were solutionannealed at temperatures up to 3000 deg F and aged at 2600 and 2300 deg F. The most stable alloy on the basis of hardness wasV-40wt% Nb--30wt% Ta--1wt% Zr--0.1wt%Nb, and this composition retained a comparatively fine grain size during all heat treatments. Initial creep tests were conducted on pack-siliconized specimens which were stressed in 2000 deg F air. Powder metallurgy techniques were used to prepare V--60 wt% Nb-1 wt% Ti alloys containing dispersed oxide or carbide powders. After sinterning the blended and compacted powders at 2800 deg F and annealing at 2400 deg F, the most stable dispersants on the basis of microstructures were yttria and hafnium carbides. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. IIT Research Inst.
• NSA Number: NSA-17-030971
• OSTI ID: 4682010
• Report Number(s): IITRI-B6007-3
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
CARBIDES
COMPACTING
CONFIGURATION
DISPERSIONS
GRAIN SIZE
HAFNIUM ALLOYS
HAFNIUM CARBIDES
HARDNESS
HEAT TREATMENTS
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM ALLOYS
OXIDES
POWDER METALLURGY
PREPARATION
REPORT
SINTERING
STABILITY
TANTALUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
VANADIUM ALLOYS
YTTRIUM CARBIDES
ZIRCONIUM ALLOYS