DEVELOPMENT OF NIOBIUM-BASE ALLOYS

Technical Report · Sun Jan 01 04:00:00 EST 1961

OSTI ID:4802202

Begley, R T; Platte, W N; Lewis, A I; Ammon, R L

The effect of oxygen and nitrogen additions on the hardness, workability, strain-hardening characteristics, and recrystallization behavior of niobium was determined. Nitrogen additions were found to be detrimental to cold rolling characteristics. Hardness, workability, and mechanical property data for Nb-C alloys were obtained. Grain boundary carbides were found to be very detrimental to cold workability. Carbon additions increased the ductile-brittle transition temperature range of niobium. Mechanical property data were obtained for many binary, ternary and quaternary niobium base alloys. Re, W, and Mo additions increased the ductile-brlttle transition of niobium. A number of alloys were prepared by the consumable-electrode arc-melting process. Ingot breakdown was accomplished by high energy rate extrusion (Dynapak). The results of Dynapak extrusion were very encouraging. Several high strength alloys were investigated. One alloy, Nb-l0W-5V-lZr, had excellent room temperature ductility and ultimate tensile strengths of 64,800 psi and 29,450 psi at l205 and l3l5 deg C, respectively. Welding data for a number of Nb-base alloys are presented. (auth)

• Research Organization: Westinghouse Electric Corp. Research Labs. Pittsburgh
• NSA Number: NSA-16-007897
• OSTI ID: 4802202
• Report Number(s): WADC-TR-57-344(Pt.V)
• Country of Publication: United States
• Language: English

Related Subjects

ADDITIVES
DUCTILITY
EFFICIENCY
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
NIOBIUM CARBIDES
NIOBIUM NITRIDES
NIOBIUM OXIDES
RHENIUM ALLOYS
TENSILE PROPERTIES
TUNGSTEN ALLOYS
VANADIUM ALLOYS
WELDING
ZIRCONIUM ALLOYS