ARC-CAST MOLYBDENUM-AND TUNGSTEN-BASE ALLOYS (1960-1961)

Technical Report · Thu Nov 01 04:00:00 EST 1962

OSTI ID:4734329

Semchyshen, M; Barr, R Q; Kalns, E

Progress of work to explain the strengthening mechanisms operative in several Mo-base alloys is described. The optimum contents for conventionally processed Mobase alloys containing Ti, Hf, Zr, and Ti + Zr are defined. The possibilities of increasing the strengths and reducing the optimum C content of these materials through solution and aging heat treatments are discussed. Attempts to prepare wrought sections of Mo-base alloys containing nominally l0% Nb and/or 10% Ta were only marginally successful owing to difficulties encountered in working the vacuum/arc-cast ingots. A series of experiments is described wherein various melting and deoxidation practices are evaluated in connection with the 50% mo--50% W alloy. Alloys based on W or on various Mo--W ratios have received considerable attention. Considerable difficulty was encountered in converting certain of the alloys of this type to bar stock. Outstanding elevated-temperature tensile and stress-rupture properties are reported for a number of the compositions that were successfully converted to wrought stock. (auth)

• Research Organization: Climax Molybdenum Co. of Michigan, Detroit
• NSA Number: NSA-17-006672
• OSTI ID: 4734329
• Report Number(s): NP-12383
• Country of Publication: United States
• Language: English

Related Subjects

AGING
CARBON
CASTING
DEOXIDATION
HAFNIUM ALLOYS
HEAT TREATMENTS
HOT WORKING
MECHANICAL PROPERTIES
MECHANICS
MELTING
METALLURGY
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
OXIDATION
QUANTITY RATIO
TANTALUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ALLOYS
ZIRCONIUM ALLOYS