The work was devoted to the study of long-term strength and creep resistance recently developed heat resistant nickel-based superalloy SDZhS-15 intended for manufacturing discs gas turbine engines. as-cast alloy subjected homogenization treatment, hot forging at subsolvus temperatures with intermediate annealing, solution treatment various aging or only aging. A predominantly fine-grained struc...

Abstract The influence of hold time on the crack growth behaviour a single crystal nickel base superalloy under in-phase thermomechanical fatigue is investigated. Two da/dt models were calibrated using creep tests in temperature range 750–950 °C: one based K and other (Ct)avg. applied, combination with cycle dependent model, to predict da/dN 1–6 h time. predictions inaccurate generally non-cons...

In this paper, mechanical properties of the as-received and aluminide layer coated MAR 247 nickel based superalloy were examined through creep fatigue tests. The 20 µm was obtained chemical vapor deposition (CVD) process in hydrogen protective atmosphere for 8 h at temperature 1040 °C internal pressure 150 mbar. A microstructure characterized using scanning electron microscopy (SEM) X-ray Energ...

Variability of fatigue properties of Nickel-based superalloys induced by microstructure feature uncertainties is investigated. The microstructure at one material point is described by its grain size and orientation features, as well as the volume fraction of the c0 phase. Principal component analysis (PCA) is introduced to reduce the dimensionality of the microstructure feature space. PCA and k...

The growth kinetics of a dendrite tip are paramount importance for microstructure modelling in materials science and engineering. However, theories multicomponent alloys limited, primarily due to approximations the relevant thermodynamic data. present contribution first reports on pragmatic implementation general framework coupled with equilibrium calculations. It is applied widely used IN718 n...