Multi Objective Optimization and Prediction During Machining of Mg-TiO2 Nanocomposite using Grey Relational Analysis (GRA) and Artificial Neural Network (ANN) Techniques
Magnesium-based metal matrix composites (Mg-MMCs) provide corrosion resistance, elevated-temperature strength and lightweight characteristics for a range of applications. This research integrates Taguchi-based Grey Relational Analysis (GRA) with Artificial Neural Networks (ANN) to assess, optimize and predict the machinability of Mg-TiO2 nanocomposites. An L9 orthogonal array was employed to investigate the effects of TiO2 nanoparticulate weight fraction, cutting speed and feed rate on cutting force, temperature and surface roughness. GRA identified 1.5 wt.% TiO2, 1000 rpm and 5 mm/min as the optimal settings for machinability. ANOVA indicated that cutting speed substantially influenced force and temperature, whereas feed rate predominantly affected surface roughness. The ANN model achieved correlation coefficients exceeding 0.99, accurately forecasting performance metrics with minimal errors. GRA-based multi-response optimization on an L9 design is integrated with an ANN to translate a discrete optimum for Mg-TiO2 machining. The ANN estimates cutting force and temperature to support data informed selection of process set points. The integrated GRA-ANN framework thus offers a dependable approach for optimizing machining parameters and forecasting machining performance in Mg-TiO2 nanocomposites.