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in this
work, an effective procedure of box-behnken based -ANN and GA
has been utilized for finding the optimum conditions of wt.% of
doping elements doped aluminizing-chromizing of incoloy 800H.
ANN and Box-Behnken design method have been implanted for
minimizing hot corrossion rate kp (10-12g2.cm-4.s-1) in incoloy
800H at 900C. ANN was used for estemating the predicted values
of hot corrossion rate kp (10-12g2.cm-4.s-1).
the
optimal wt.% of doping elements combination to obtain minimum
hot corrossion rate was calculated using genetic algorithm
approach. the predicted optimal values for minimizing hot
corrossion rate for incoloy 800H coated by (Ce-Y-Ge) doped-aluminizingchromizing
are (3wt.%Ce, 3wt.%Y, and 3wt.%Ge), the hot corrossion rate kp
(10-12g2.cm-4.s-1) value at these conditions was found to be
71.701. the results have been verfied by confirmation
experiment, resultes obtained by GA method match closely with
experimental values (R2=98.30). EDS and XRD results show that
the formation of protective layers AL2O3 and Cr2O3 during hot
corrosssion tests. |
