Cobalt-nickel base alloys containing chromium and molybdenum

Claim 1

A WORK-STRENGTHENED ALLOY CONSISTING ESSENTIALLY OF A MATRIX PHASE HAVING DISPERSED THEREIN AT LEAST 5 VOLUME PERCENT OF A PLATELET PHASE, SAID MATRIX PHASE BEING A SOLID SOLUTION OF A COMPOSITION CONSISTING ESSENTIALLY OF, BY WEIGHT, 5 TO 45% NICKEL, 7 TO 16% MOLYBDENUM, 13 TO 25% CHROMIUM, UP TO 0.05% CARBON, UP TO 2% ALUMINUM, UP TO 2% TITANIUM, UP TO 2% ZIRCONIUM, THE SUM OF ALUMINUM, TITANIUM AND ZIRCONIUM BEING NO GREATER THAN 4%, UP TO 0.5% SILICON, UP TO 6% COPPER, UP TO 6% IRON AND INCIDENTAL ELEMENTS NOT EXCEEDING 0.1%, THE BALANCE BEING COBALT IN THE PROPORTION OF AT LEAST 25%, THE SUM OF THE COBALT AND NICKEL BEING IN THE RANGE OF 62 TO 80% AND THE SUM OF THE PERCENTS OF COBALT AND NICKEL DIVIDED BY THE PERCENT CHROMIUM BEING AT LEAST 2.6 HAVING A FACE-CENTERED-CUBIC CRYSTAL STRUCTURE AND SAID PLATELET PHASE BEING A SOLID SOLUTION OF SAID ALLOY COMPOSITION HAVING A HEXAGONAL-CLOSE-PACKED CRYSTAL STRUCTURE, THE PLATELETS BEING ABOUT FROM 20 TO 1000 A. THICK AND BEING DISTRIBUTED SUBSTANTIALLY ON THE (111) PLANES OF THE MATRIXPHASE CRYSTALS, SAID WORK-STRENGTHENED ALLOY BEING CHARACTERIZED BY HAVING, IN A TENSILE TEST AT 68*F., AN ULTIMATE TENSILE GREATER THAN 160,000 P.S.I. AND A DUCTILITY, AS MEASURED BY REDUCTION IN AREA, GREATER THAN 3%.