RESEARCH ON WORKABLE REFRACTORY ALLOYS OF TUNGSTEN, TANTALUM, MOLYBDENUM, AND COLUMBIUM
The W-- Ta-- Mo-- Nb alloy system was previously investigated, and several tungsten- and tantalum-rich alloys were developed and evaluated in the form of extruded bars. Many of these alloys exhibited very high strengths at 3000 deg F; in fact, the tensile strengths of some alloys were in excess of 60,000 psi. A continuation was made of this effort, aimed at producing and evaluating alloys from the W-- Ta- Mo-- Nb system in the form of sheet and increasing the hightemperature strengih of alloys of this type by the formation of dispersed carbides. Small cylindrical ingots of six selected W-- Ta-- Mo-- Nb alloys and unalloyed tungsten were consumably vacuum arc-melted by a multiple electrode technique and successfully extruded to sheet bars. Two alloys and unalloyed tungsten were rolled to sheet and recrystallizatton temperatures, bend transition temperatures, and high-temperature tensile properties were determined. The other four alloys could not be rolled to sheet by the techniques attempted in this program. A technique for consumably vacuum arc melting 88W-- 12Nb alloys that contain small amounts of vanadium, zirconium, and carbon was developed. In the as-extruded condition, the alloys showed 3500 deg F tensile strengths of 49,000 to 57,000 psi---this constituted a twofold increase in strength above that of the base solid solution composition. (auth)
- Research Organization:
- Crucible Steel Co. of America, Pittsburgh
- NSA Number:
- NSA-17-027812
- OSTI ID:
- 4696127
- Report Number(s):
- WADD-TR-61-134(Pt.II)
- Country of Publication:
- United States
- Language:
- English
Similar Records
RESEARCH ON REFRACTORY ALLOYS OF TUNGSTEN, TANTALUM, MOLYBDENUM, AND COLUMBIUM. Quarterly Progress Report No. 3
PILOT EVALUATION OF VANADIUM ALLOYS. Bimonthly Report No. 6, July 18, 1962-September 17, 1962
Related Subjects
DISPERSIONS
ELECTRIC ARCS
EXTRUSION
HIGH TEMPERATURE
MEASURED VALUES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
RECRYSTALLIZATION
RODS
ROLLING
SHEETS
TANTALUM ALLOYS
TEMPERATURE
TENSILE PROPERTIES
TUNGSTEN
TUNGSTEN ALLOYS
VACUUM
VANADIUM ALLOYS
ZIRCONIUM ALLOYS