DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Quarterly Report No. 2

Technical Report · Fri Apr 17 04:00:00 EST 1959

OSTI ID:4749783

Holtz, F C; Van Thyne, R J

High tungsten alloys for service up to 1090 deg C were prepared and tested. Compositions containing between 90 and 99.5 wt% tungsten were produced by powder metallurgy techniques. Ternary W --Ni -Fe alloys exhibited maximum room-temperature strengih at 95 wt% tungsten, and tensile elongation values decreased above 90 wt% tungsten. At 1090 deg C the greatest strength occurred between 95 and 97 wt% tungsten; a 100-hour stress-rupture life was estimated at 2500 to 3000 psi for compositions containing up to 99 wt% tungsten. Quaternary additions of Al, C, Cr, Mo, Th, Ti, V, and Zr to a 90W --Ni --Fe base were studied. Moderate improvements in elevated-temperature properties were effected by alloys containing 0.1 wt% carbon, 3 wt% chromium or 5 wt% molybdenum; and room- temperature workability was not seriously impaired. Other alloy systems investigated included 90W -Ni --Cr and 90W --Ni-Ru. Properties of the compositions containing chromium were similar to those of the W -NiFe alloys; initial results for the W--Ni --Ru materials indicate a higher melting matrix phase which may improve the strength properties at 1090 deg C. (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-17-014826
• OSTI ID: 4749783
• Report Number(s): LAR-14; ARF-2158-6
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
CARBIDES
FAILURES
HIGH TEMPERATURE
IRON ALLOYS
MACHINING
MATERIALS TESTING
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHASE DIAGRAMS
POWDER METALLURGY
PREPARATION
QUANTITY RATIO
RUTHENIUM ALLOYS
STRESSES
TEMPERATURE
TENSILE PROPERTIES
THORIUM ALLOYS
TITANIUM ALLOYS
TUNGSTEN
TUNGSTEN ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS