Accession Number : AD0284832

Title :   DEVELOPMENT OF WORKABLE MOLYBDENUM AND TUNGSTENBASE ALLOYS

Corporate Author : CLIMAX MOLYBDENUM CO OF MICHIGAN DETROIT

Personal Author(s) : SEMCHYSHEN,M. ; BARR,ROBERT Q. ; CHESMAR,G.G.

Report Date : JUN 1962

Pagination or Media Count : 1

Abstract : A number of complex molybdenum-, molybdenumtungsten-, and tungsten-base alloys were consolidated by the vacuum-arc-casting technique. Successful extrusions were realized from all of the vacuum-arc-cast ingots. Extrusion constants well above those of earlier experiments were measured, indicative of the good elevated-temperature strength and concomitant high resistance to extrusion of the materials studied. Rolled bars were studied from the standpoint of recrystallization behavior, transition temperature, tensile properties as a function of temperature and, to a limited extent, creep-rupture properties. A carbon synergism was studied in the alloys Mo + 3% Ti + 0.5% Zr and Mo + 25% W + 1.25% Ti + 0.1% Zr from the standpoint of elevated temperature strength. In the case of both alloys, the carbon contents yielding the highest elevated temperature strengths also resulted in the highest transition temperatures as measured by the tensile test. 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. (Author)

Descriptors :   *MOLYBDENUM ALLOYS, *TUNGSTEN ALLOYS, CARBON, CASTING, CRYSTALLIZATION, EXTRUSION, HARDNESS, MECHANICAL PROPERTIES, STRESSES, TENSILE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE