DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Summary Report

Technical Report · Thu Nov 12 04:00:00 EST 1959

OSTI ID:4756917

Holtz, F C; Van Thyne, R J

Tungsten-rich alloys, developed for use at temperatures up to 2000 deg F, exhibit ductility, fabricability and joinability not found in commercially- available materials. An envelope type of microstructure was produced in compositions containing at least 90 wt% tungsten by liquid-phase sintering of cold-pressed powders in hydrogen. At room temperature the alloys could be rolled extensively, and tensile elongations up to 25% were noted. Strength properties of a W-Ni-Fe base were improved by small quaternary additions. The ultimate tensile strength of a 90W-4.8Ni-3.2Fe-2Ru alloy was 46,700 psi at 2000 deg F, compared to 30,000-35,000 psi for unalloyed tungsten or W--Ni-Fe; the 100-hour stress-rupture strength at 1600 deg F was l5,000 psi. Excellent joints were produced by spot welding and localized induction heating. The oxidation resistance of unprotected 90 wt% tungsten compositions was not significantly affected by alloying. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-17-014805
• OSTI ID: 4756917
• Report Number(s): ARF-2158-12; LAR-19
• Country of Publication: United States
• Language: English

Related Subjects

ALLOYS
COLD WORKING
COMPACTING
DUCTILITY
FABRICATION
FAILURES
HEAT RESISTING METALS
HEATING
HIGH TEMPERATURE
HYDROGEN
INDUCTION
IRON ALLOYS
JOINTS
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
NICKEL ALLOYS
OXIDATION
POWDERS
ROLLING
RUTHENIUM ALLOYS
SINTERING
STABILITY
STRESSES
TEMPERATURE
TENSILE PROPERTIES
TUNGSTEN ALLOYS
USES
WELDING