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Three alloys consisting of 10, 25, and 50 wt-% Mo in W were evaluated at 2500 to 4400 F to determine their tensile properties. Results showed the 10 and 25 wt-% alloys have higher tensile strength than unalloyed W at 2500 and 3000 F and equivalent strength to about 3500 F. The 50 wt-% alloy has strength equivalent to unalloyed W from 2500 to 3200 F. Unalloyed W has higher strength than the alloys above 3500 F. The results of stress-rupture tests for the 50 wt-% alloy are presented for the temperature range oof 2500 to 3500 F in the as-worked and fully annealed conditions. (Author).
The results of a state-of-the-art survey covering tungsten and ten of its alloys are presented. All data are given in tabular and graphical form covering some of the more important physical, mechanical, and metallurgical properties for each material. References are given at the conclusion of each material section.
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).
Outstanding mechanical properties reported are: tensile strengths from 1800 to 2400 degrees F of 33,670 and 27,500 pounds per square inch; 100-hour strength at 1800 degrees F of 19,300 plus or minus 300 pounds per square inch. The properties of materials evaluated varied with degree of "effective" cold working, recrystallization, temperature, and manufacturing source.