Study on high-temperature oxidation kinetics of Haynes 282 and Inconel 718 nickel-based superalloys

摘要: High-temperature oxidation studies on nickel-based superalloys have reportedly used weight change measurements to assess the overall kinetics. In this study, experiments were conducted under laboratory air from 0 10 h at 1050 and 1100 °C in furnace investigate kinetics of Haynes 282 Inconel 718 superalloys. As observed, superalloy displayed a linear/quasi-parabolic behaviour both test temperatures with (n = 0.65) 1050 °C (n = 0.68) 1100 °C. Notably, best-fit for after 10 h’ exposure was found be non-linear closer parabolic and/or cubic n = 0.37. However, same alloy observed (n = 0.61) exposure. The morphology elemental compositions surface oxides formed assessed by scanning electron microscopy (SEM) X-ray energy dispersive spectroscopy (EDS). relatively slow over temperature experimental conditions. Response methodology (RSM) analyse data generate regression models predicting specific ANOVA evaluate fitness adequacy each selected 2FI model. models’ predictive power validated based close agreement (over 99% R2 values) between predicted actual mean change.