DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Quarterly Report No. 3

Technical Report · Wed Jul 15 00:00:00 EDT 1959

OSTI ID:4749782

Holtz, F C; Van Thyne, R J

High-tungsten alloys prepared by powder metallurgy techniques were evaluated at temperatures up to 2000 deg F (1090 deg C). Alioys of the W--Ni--Fe system containing 90 to 97 wt% tungsten were cold-workable and had ultimate tensile strength values up to 34,000 psi at 2000 deg F (1090 deg C). The effects of small quaternary additions of Al, C, Cr, Mo, Th, Ti, V, and Zr to the W --Ni-- Fe base were studied. Alloys of the W-Ni-Co system containing 90 to 97 wt% tungsten exhibited reduced strength and ductility at room temperature but were considerably superior to W -Ni -Fe compositions at elevated temperatures. Quaternary additions of Cr, Fe, and Mo to the W -Ni -Co base were evaluated. Other alloy systems studied to a limited extert included W --Ni --Cr, W --Ni -- Ru, W --Co --Ru, and W --Co Cr; tungsten levels were maintained at a minimum of 90 wt%. Induction heating, spot welding, and tungsten inert-gas welding techniques were used to join pieces of sintered W--Ni--Fe alloys. Initial results showed that satisfactory bonds are obtained by heating the contact areas to a temperature slightly above the melting point of the matrix phase. Successfui roll bonding of Nichrome to W--Ni --Fe specimens at 2200 deg F (1200 deg C) indicates the possibility of improved oxidation protection. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• DOE Contract Number: AT(33-3)-4
• NSA Number: NSA-17-014827
• OSTI ID: 4749782
• Report Number(s): LAR-17; ARF-2158-9
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
ALUMINUM ALLOYS
BONDING
CARBIDES
CHROMIUM ALLOYS
COBALT ALLOYS
COLD WORKING
CORROSION PROTECTION
DUCTILITY
HEATING
HIGH TEMPERATURE
INDUCTION
INERT GASES
JOINTS
MELTING POINTS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OXIDATION
PHASE DIAGRAMS
POWDER METALLURGY
PREPARATION
RUTHENIUM ALLOYS
SINTERED MATERIALS
TEMPERATURE
TENSILE PROPERTIES
THORIUM ALLOYS
TITANIUM ALLOYS
TRACE AMOUNTS
TUNGSTEN ALLOYS
VANADIUM ALLOYS
WELDING
ZIRCONIUM ALLOYS