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Characterization of Microscale Drilling Process for Functionally Graded M2-Cu Material Using Design of Experiments
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 Title & Authors
Characterization of Microscale Drilling Process for Functionally Graded M2-Cu Material Using Design of Experiments
Sim, Jongwoo; Choi, Dae Cheol; Shin, Ki-Hoon; Kim, Hong Seok;
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In this study, a microscale drilling process was conducted to evaluate the cutting characteristics of functionally graded materials. A mixture of M2 and Cu powders were formed and sintered to produce disk specimens of various compositions. Subsequently, a microscale hole was created in the specimen by using a desktop-size micro-machining system. By using design of experiments and analysis of variance, it was found that the M2-Cu composition, spindle speed, and the interactions between these two factors had significant effects on the magnitude of cutting forces. However, the influence of feed rate on the cutting force was negligible. A mathematical model was established to predict the cutting force under a wide range of process conditions, and the reliability of the model was confirmed experimentally. In addition, it was observed that increasing the wt% of Cu in an M2-Cu specimen increased the high-frequency amplitude of cutting forces.
Microscale drilling;Functionally graded material;Cutting force;Design of experiments;Analysis of variance;
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