ZIRCONIUM-NIOBIUM PHASE DIAGRAM

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Met. i Metalloved. Chistykh Metal., Sb. Nauchn. Rabot

OSTI ID:4794520

Bychkov, Yu F; Rozanov, A N; Skorov, D M

X-ray, thermal, dilatometric, thermal-elastic and metallographic methods were employed to study transformations and to plot a phase diagram of the Zr-Nb system. The alloys investigated were melted in an arc furnace in argon atmosphere from a Nb-strip of iodide Zr rods of 99.7% purity. After 3 to 5 fold remelting the ingots were forged at 800 to 600 deg C and subjected to heat treatment. It was established that in the Zr-Nb system at high temperatures a continuous series of solid solutions are formed be, tween BETA -Zr and Nb with a minimum on the solidus curve at 1,600 deg C and 30% Nb. At 560 deg C, the eutectoid decomposition of BETA -solid solutions took place. The eutectoid point corresponded to 12% Nb. During the quenching of alloys containing up to 15% Nb, the BETA -solution was partially or fully transformed into acicuIar or reticular martensite-like structure. In alloys with 15% and more Nb, a body centered cubic BETA -phase appeared during quenching from high temperatures. (Ref. Zh. Met., No. 12, 1981)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-000556
• OSTI ID: 4794520
• Journal Information: Met. i Metalloved. Chistykh Metal., Sb. Nauchn. Rabot, Journal Name: Met. i Metalloved. Chistykh Metal., Sb. Nauchn. Rabot Vol. Vol: No. 1
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARGON
CONFIGURATION
DIFFRACTION
DTA
ELASTICITY
ELECTRIC ARCS
EUTECTICS
EXPANSION
FORGING
FURNACES
HEAT TREATMENTS
HIGH TEMPERATURE
LATTICES
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM ALLOYS
PHASE DIAGRAMS
QUENCHING
SOLID SOLUTIONS
TEMPERATURE
X RADIATION
ZIRCONIUM ALLOYS
ZIRCONIUM IODIDES