The fatigue-limit model studied here contains an unknown fatigue limit parameter. Under this model, specimens tested below this fatigue-limit level of stress will never fail. The model also allows the standard deviation of fatigue life to be a function of stress. Researchers can use this model to describe the standard deviation and stress dependence in fatigue data. To illustrate its applicatio...

Abstract In industrial gas turbine (IGT) engine manufacturing, nickel-based superalloys are used mainly to meet the needs of components hot pathway. Although these alloys have high-temperature capabilities, parts prone damage during service. The high working temperatures engines lead component degradation due creep, fatigue, and oxidation reactions; therefore, cost newly produced superalloy com...

Three-dimensional electron backscatter diffraction data, obtained by serial sectioning a nickel– base superalloy, has been analysed to measure the geometric arrangement of grain boundary planes at triple junctions. This information has been used to calculate the grain boundary character distribution (GBCD) and the grain boundary energy distribution (GBED). The twin content from the three-dimens...

It is well known that the solution cooling rate has a great effect on the creep life of superalloys. In this research, three typical cooling rates were applied to generate different distributions of γ’ precipitates for creep tests. Ingots used to make specimens were manufactured by hot extrusion, and the master alloy had the composition of an FGH4096 power metallurgy superalloy. SEM and SESD we...