Investigations on austenitic nickel-chromium based super alloys - Inconel 625 and Inconel 718 from material removal rate in micro electrochemical machining
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Abstract
This paper is focused to compare the two different nickel-based alloys from the experimental results achieved from the micro electrochemical machining (ECM). An Austenitic nickel-chromium based super alloys are used in many applications, namely gas turbine blades, combustors and seals, turbocharger rotors and seals, exchange of heating tubes, automotive industries and pressure vessels, etc. The conventional machining is not suitable for experimentation of Inconel 625 and Inconel 718 alloys, because these alloys are difficult to cut materials. An experimental data’s are extracted from the literatures, if the researchers used same equipment for experimentation and same input parameters. The input parameters is selected for comparison are namely voltage supplied (V), electrolyte concentration (E) of electrolyte and feed rate (F) of the electrode. The major output response of micro ECM is the material removal rate (MRR). The optimum results of MRR value 0.0917 mm3/min is obtained by Inconel 625 alloy at run number 3, i.e., 0.25 moles/lit, 14 volts and 0.06 mm/min. The average MRR value for Inconel 625 alloy and Inconel 718 alloy being 0.06479 mm3/min and 0.06356 mm3/min respectively. The results of the material removal rates of Inconel 625 and 718 alloys from micro ECM are compared.
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