DEVELOPMENT OF NEW NICKEL-BASED SUPERALLOY BY PREVENTING THE FORMATION OF TOPOLOGICALLY CLOSE-PACKED PHASES AND CONTROLLING OF GRAIN BOUNDARY MORPHOROGY

摘要

19.5% to 20.0% by weight of cobalt (Co); 1.75% to 2.25% by weight of niobium (Nb); 0.025% to 0.035% by weight of carbon (C); 0.005% to 0.015% by weight of boron (B); and nickel (Ni) balance, to which trace elements are added, to provide a nickel-based superalloy.