Accession Number : AD0468299


Title :   DEVELOPMENT AND EVALUATION OF TUNGSTEN-BASE ALLOYS.


Descriptive Note : Final rept., 10 Jan 64-10 Mar 65,


Corporate Author : CLIMAX MOLYBDENUM CO OF MICHIGAN DETROIT


Personal Author(s) : Semchyshen, M ; Barr, Robert Q ; Kalns, Eric


Report Date : 10 Mar 1965


Pagination or Media Count : 97


Abstract : The investigation is concerned with the development of tungsten-base alloys having high strengths at elevated temperatures. The major portion of the alloys are ternaries containing carbon and up to nominally 0.5% Zr, 1% Hf or 2% Cb as the alloy additions; however, several quaternary alloys are included which contain carbon and the same alloying elements in various combinations. In addition, boron was substituted for carbon in three of the heats. All of the alloys were consolidated by vacuum-arc-melting. Primary working of the as-cast ingots was achieved by extrusion; the tungsten-base alloy blanks were encapsulated in molybdenum prior to extrusion. Additional working of the extruded materials was attempted by swaging. Even though the facilities utilized for swaging had temperatures available for heating of the work up to 3500 F, the working temperatures were too low for successful swaging of the extruded billets, and, as a result, only two alloys yielded reasonable stock after swaging. Strength properties and recrystallization temperatures are reported for the alloys after extrusion and after swaging. It is shown that both strength and recrystallization temperature are dependent on the carbon as well as the metallic alloy content. (Author)


Descriptors :   *TUNGSTEN ALLOYS , HEAT RESISTANT ALLOYS , NIOBIUM ALLOYS , HAFNIUM ALLOYS , ZIRCONIUM ALLOYS , CARBON ALLOYS , BORON ALLOYS , VACUUM FURNACES , SINTERING , EXTRUSION , CHEMICAL ANALYSIS , X RAYS , FLUORESCENCE , TABLES(DATA) , EXPERIMENTAL DATA , CASTINGS , MICROSTRUCTURE , FRACTOGRAPHY , ENCAPSULATION , MOLYBDENUM , RECRYSTALLIZATION , GRAIN STRUCTURES(METALLURGY) , TENSILE PROPERTIES , MATERIAL FORMING , FURNACES , CONTROLLED ATMOSPHERES , HYDROGEN , CREEP , RUPTURE , AGING(MATERIALS) , AGING(MATERIALS)


Distribution Statement : APPROVED FOR PUBLIC RELEASE