Dynamic Oxidation Behavior and Exceptional High-Temperature Resistance of Nano Particle-Strengthened Superalloy (MA 754) under Cyclic Temperature Conditions

Abstract

Abstract The degradation of industrial components due to high-temperature oxidation poses a significant challenge. This work highlights the promising oxidation resistance of MA 754 superalloy under cyclic high-temperature conditions. This study investigated the oxidation behavior of the Ni-based superalloy MA 754 at 1100°C under cyclic conditions. Weight change measurements were taken every two thermal cycles to determine the kinetics of oxidation. Optical microscopy, scanning electron microscopy, X-ray diffraction, and energy dispersive spectroscopy were used to characterize the oxide scales' microstructure, morphology, phases, and composition. The results revealed that the MA 754 superalloy demonstrated excellent resistance to oxidation, with a mean net mass change of 0.032 mg/cm2 over the oxidation time. The oxidation products identified were NiO, NiCr2O4, and Al2O3. The oxide scales' morphology changed from pyramidal to granular type during the oxidation test. The oxidation steps of the MA 754 superalloy were determined by comparing the microstructures of the alloy surface next to the oxide layer