Nickel-based superalloy was resistant to pendillements by fatigue and its method of manufacturing

摘要

Describes an alloy which is ready to - even particularly well to a thermomechanical treatment. The alloy is reinforced by precipitates similar to those of the inconel 718, but the matrix of the alloy is a matrix of nickel - chromium - cobalt, instead of the matrix nickel - chromium - iron of the inconel alloy. In addition, the mean diameter of the grains of the alloy is of 35 μm or more. The resistance to fatigue, the tensile strength and resistance to rupture of the alloy are improved in a manner that is remarkable to the remainder of the thermomechanical treatment. The thermomechanical treatment is carried out by - bottom of the recrystallization temperature in order to avoid the nucleation of the fine grains. The residual stresses due to the thermomechanical treatment or to the work to provide the combination is particularly favorable characteristics of the alloy. / p & & p & application to the nickel-based superalloys for the reaction and a gas turbine.