Computer simulation of the cyclic oxidation of the Al–Si coatings

Study of the Cyclic Oxidation Resistance of Superalloy IN-625: Lifetime Predicted by COSP-Modelling Program

“…maximum and minimum temperature, cooling and heating rate, surface preparation, material composition, hold time, play an important role during cyclic oxidation. 1,[9][10][11][12] Generally cyclic-oxidation, weight-change curves exhibit a basic shape consisting of an initial weight gain to a maximum value, a decrease followed by crossover to negative weight change, and finally a nearly linear rate of weight loss. 13,14 The total amount of material consumed is a complex function of the growth kinetics and degree of spallation, which therefore usually eludes an analytical solution.…”

AnT²COK, an analytical model for cyclic oxidation kinetics of hot-work tool steels in transient thermal cycling conditions

“…These tests often result in a spallation mechanism in which a local rupture of the oxide layer and possibly a net loss of mass take place, due to local stresses at the oxide/metal interface [27,28,34,35,38,40]. Under these conditions, the modeling is based on the quantification of both mass gains by oxidation and mass loss by spallation in cyclic conditions [43][44][45][46][47].…”

“…• the tests are usually performed with a temperature ramp-up, a long dwell at the maximum temperature and then a fast cooling stage before restarting the cycle [34,35,[43][44][45][46][47], whereas our tests are fully transient;…”

“…• a low number of cycles (usually less than hundred cycles) is applied [35,[43][44][45][46][47], compared to several ten thousand cycles in our thermal fatigue tests;…”