AN INVESTIGATION OF METALLIC COMPOUNDS IN MULTICOMPONENT NICKEL ALLOYS CONTAINING NIOBIUM

Journal Article · Mon Jan 11 00:00:00 EST 1960 · Doklady Akad. Nauk S.S.S.R.

OSTI ID:4147078

Golubtsova, R B; Nude, L A

Intermetallic analysis of the composition and structure of alloys with vamous contents of niobium shows that multicomponent alloys form solid solutions with a NNb metallic base. Microstructures of A-Cr- Mo-Nb- Ni-Ti-W alloys were studied after thermal treatment at 1200 deg C for 200 hours followed by air cooling. Electrode potentials of Ni/sub 3/Nb intermetallics and gamma solid solutions were measured with various electrolytes, and the effects of current on yield and composition are tabulated. The data show that the Ni/sub 3/Nb base compound (phase yield 16.3%) is segregated at + 18 to 0 deg C. Along the side the Ni/sub 3/Nb phase at-8 deg C a solid solution is formed which somewhat increases the phase yield. In all alloys the segregated phase appears as solid solution Ni/ sub 3/Nb with a rhombic crystalline lattice. Considering the crystal radii, it is assumed that Cr (1.28A) atoms replace the Ni (1.24A) and W (1.41A), and Mo (1.40A) atoms replace Nb (1.47A); thus the formula of the complex can be expressed as (Ni, Cr)/sub 3/(Nb, W, Mo). The investigation also establishes the quantity and content of Ni/sub 3/Nb and gamma solution in various alloys. (R.V.J.)

• Research Organization: Baikov Inst. of Metallurgy, Academy of Sciences, USSR
• NSA Number: NSA-14-012012
• OSTI ID: 4147078
• Journal Information: Doklady Akad. Nauk S.S.S.R., Vol. Vol: 130; Other Information: Orig. Receipt Date: 31-DEC-60
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

METALS, CERAMICS, AND MATERIALS
AIR
ALUMINUM ALLOYS
ATOMS
CHROMIUM
CHROMIUM ALLOYS
COMPLEXES
COOLING
CRYSTALS
CURRENTS
DISTRIBUTION
EFFICIENCY
ELECTRIC POTENTIAL
ELECTROLYTES
HEAT TREATMENTS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LATTICES
MEASURED VALUES
METALLOGRAPHY
MOLYBDENUM
MOLYBDENUM ALLOYS
NICKEL
NICKEL ALLOYS
NIOBIUM
NIOBIUM ALLOYS
SEGREGATION
SOLID SOLUTIONS
TITANIUM ALLOYS
TUNGSTEN
TUNGSTEN ALLOYS