DEVELOPMENT OF WORKABLE MOLYBDENUM- AND TUNGSTEN-BASE ALLOYS

Technical Report · Mon Apr 30 04:00:00 EDT 1962

OSTI ID:4747828

Semchyshen, M; Barr, R Q; Chesmar, G G

A number of complex Mo-, Mo-W-, and W-base alloys were consolidated by the vacuum-arc-casting technique. Difficulty was experienced in obtaining sound castings of alloys based on varying Mo/W ratios and containing nominally 1.25% Ti and 0.3% Zr. No difficulties were experienced when the Zr content was reduced to 0.1%. Carbon synergism was studied in the alloys Mo + 3% Ti + 0.5% Zr and Mo + 25% W + 1.25% Ti + 0.1% Zr. In the case of the former alloy, the optimum carbon content from the standpoint of elevated temperature strength appeared to be lower than that predicted on the basis of earlier work with Mo--Ti and Mo-- Zr binary alloys. Conversely, the optimum carbon content of the latter alloy agreed wel1 with the extrapolated forecast. In the case of both alloys, the carbon contents yielding the highest elevated temperature strengths also resulted in the highest transition temperatures. An alloy based on Mo-50% W, and containing 0.8% Ti and 0.3% Zr, displayed exceptionally high strengths at elevated temperatures. The tensile transition temperature of this material was, however, above room temperature. (auth)

• Research Organization: Climax Molybdenum Co. of Michigan, Detroit
• NSA Number: NSA-16-033368
• OSTI ID: 4747828
• Report Number(s): ASD-TDR-62-508
• Country of Publication: United States
• Language: English

Related Subjects

CARBON
CASTING
ELECTRIC ARCS
HIGH TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
QUANTITY RATIO
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ALLOYS
VACUUM
ZIRCONIUM ALLOYS