IMPROVED VANADIUM-BASE ALLOYS. Final Report, December 1, 1959-November 30, 1960

Technical Report · Mon Dec 26 23:00:00 EST 1960

OSTI ID:4037040

Rajala, B R; Van Thyne, R J

Vanadium-niobium base alloys exhibiting an excellent combination of fabricability, weldability, and strength up to 2200 deg F were investigated. Alloying behavior was evaluated in neutral atmospheres by room-temperature, 2000, 2200, and 2400 deg F tensile tests and by 2000 deg F stress-rupture data. Titanium in amounts of 5 wt.% proved to be a bettsr solid solution strengthener of the V-Nb base than either hafnium or zirconium. The strongest alloy investigated was V-60 wt.% Nb with an ultimate tensile strength of approx 63,000 psi at 2000 deg F; V-5 wt.% Ti-20 wt.% Nb exhibits a tensile strength of 50,000 psi at this temperature. The data compare favorably with the strength of the strongest sheet materials at 2000 deg F. With no post-welding heat treatment, welded sheet of V-5 wt.% Ti-20 wt.% Nb passed a 180 deg , 3t bend test. The recrystallization temperature of vanadium was raised 700 deg F with carbon additions, and 800 deg F with boron additions. An alloy V-5 wt.% Ti-20 wt.% Nb0.25 wt.% C had a 100-hour 2000 deg F stress-rupture strength of 6000 psi. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-15-016040
• OSTI ID: 4037040
• Report Number(s): ARF-2191-6
• Country of Publication: United States
• Language: English

Related Subjects

ALLOYS
BORON
CARBON
ENRICHMENT
FABRICATION
HAFNIUM
HEAT TREATMENTS
HIGH TEMPERATURE
HYDROXIDES
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM ALLOYS
PHASE DIAGRAMS
RECRYSTALLIZATION
SHEETS
SOLID SOLUTIONS
STRESSES
TEMPERATURE
TENSILE PROPERTIES
TESTING
TITANIUM ALLOYS
VANADIUM
VANADIUM ALLOYS
WELDING
ZIRCONIUM