Publication de 4 numéros par an
ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360
Indexed in
EXPERIMENTAL INVESTIGATIONS ON PRECISION MACHINING OF THERMAL BARRIER COATINGS AND APPLICATION OF THE GREY RELATION APPROACH TO DETERMINE THE OPTIMUM PROCESS PARAMETERS
RÉSUMÉ
The metallic component of thermally sprayed industrial ceramic oxide coatings, i.e., thermal barrier coatings (TBC) exhibit both metal and ceramics features such as toughness, increased hardness, thermal and chemical degradation, and wear resistance. Despite their outstanding performance characteristics, TBCs are not widely used due to the high machining cost, difficulty to machine, and the inadequate machining information. The thickness (100 to 300 μm) of TBCs demand precision machining carried out by surface grinding and lapping using special tools. The performance characteristics of precision machining of TBCs are studied experimentally at various cutting parameters by measuring the cutting forces Ft and Fn and surface roughness Ra. Optimum machining conditions for better performance are discussed. Further work shows a productive approach to the optimization of the multiple output characteristics based on the grey relation analysis to minimize Ft, Fn, and Ra using trials conducted according to the orthogonal array of Taguchi's method. The table and graphs for each level of the precision machining factors (type of coating, grinding wheel type, spray jet power, and standoff distance) are obtained. Using the ANOVA, the significant influence of the type of a grinding wheel has been revealed. An optimal combination of the input parameters was verified through a series of confirmation tests. It is proved that the above output quality characteristics would improve the efficiency through this approach.
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Yunus Mohammed, Alsoufi Mohammad S., Mathematical Modelling of a Friction Stir Welding Process to Predict the Joint Strength of Two Dissimilar Aluminium Alloys Using Experimental Data and Genetic Programming, Modelling and Simulation in Engineering, 2018, 2018. Crossref
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Asadullah Mohammed, Bhagyashekar M. S., Yunus Mohammed, RSM multi-properties optimization of various input factors of thermal barrier composites, Multiscale and Multidisciplinary Modeling, Experiments and Design, 5, 1, 2022. Crossref