Optimization of the effect of indentation Load and dwell Time on Micro hardness values using Fuzzy logic predictive model

Abstract

Abstract Nimonic 80A and Nimonic 90 belong to the family of nickel based super alloys and are widely used in high temperature applications. In this study, the effect of indentation load (10 to1000 gf) and dwell time (3to15 s) on the micro-hardness of Nimonic 80A and Nimonic 90 are investigated. A fuzzy logic predictive model is established to predict the micro hardness with respect to changes in the input parameters of indentation load and dwell time. The experimental results show a good degree of agreement with the fuzzy logic model, for both Nimonic 80A and Nimonic 90 with a minimum error %age of 3.05 and 1.80 respectively.