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Prediction and analysis of thermal diffusion in plasma assisted machining of inconel-718 superalloy based on exponential smoothing

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Document pages: 9 pages

Abstract: Nickel based and titanium based materials are widely used in aerospace engines and are important components of aircraft. The machining characteristics of aerospace materials may lead to the wear of machining tools in a short time, thus reducing the machining accuracy. The plasma assisted machining used in this study is a complex machining method. In the case of nickel base and titanium base alloys, this method can heat the workpiece in a very short time to soften the material for cutting, so as to reduce the cutting force, tool wear and processing cost. In this study, plasma heating was used to soften some materials in order to explore the heating of nickel base alloy. Temperature variableon of the materials was investigated and measured by adjusting the current and feed velocity. Moreover, Inconel-718 superalloy was adopted for the comparison with nickel base alloy for the observation of the influence and change brought by heat, and the method of exponential smoothing was adopted to conduct the prediction and analysis of thermal diffusion for understanding the influence and change brought by electric current on nickel base materials. Finally, given the current from 20 A to 80 A and feed velocity from 1,000 mm min to 3,000 mm min, the influence of thermal diffusion was investigated and the related model was built.

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