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Finishing characteristics of Inconel alloy 625 bars in ultra-precision magnetic abrasive finishing using CNC machine center

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Abstract

An ultra-precision magnetic abrasive finishing (UPMAF) process is an efficient mirror finishing technique. This research utilized the ultra-precision magnetic abrasive finishing technique to improve the accuracy of advanced material of Inconel alloy 625 cylindrical bars. The finishing technique employed flexible unbonded magnetic abrasive tools with neodymium permanent magnets (Nd-Fe-B), and components of the finishing procedure were installed with a five-dimensional computer numerical control (CNC) machining center. The surface accuracy and dimensional accuracy of Inconel alloy 625 bars were enhanced by the ultra-precision magnetic abrasive finishing technique with input parameters of workpiece rotational speed, workpiece feed rate, and magnetic abrasive grain size. After characterization with energy dispersive X-ray analysis (EDX), atomic force microscope (AFM), and a thermal imaging camera, we found that this ultra-precision magnetic polishing technology can improve surface roughness Ry of Inconel alloy 625 cylindrical bars from 2010 nm to 200 nm at a rotational speed of 12000 rpm, feed rate of 2000 mm/min, diamond abrasive grain size of 1 μm, and flux density of 300 mT processing of 5 min.

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Acknowledgments

This work was financially supported by the National Research Foundation of Korea via a grant funded by the Korean government (Project No: 2020R1F1A1061754).

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Authors and Affiliations

  1. Department of Convergence Technology Engineering, Jeonbuk National University, Jeonju, 54896, Korea

    Jung Tak Bae & Han Joo Kim

  2. Eco-Friendly Machine Parts Design Center, Jeonbuk National University, Jeonju, 54896, Korea

    Han Joo Kim

Authors
  1. Jung Tak Bae
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  2. Han Joo Kim
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Corresponding author

Correspondence to Han Joo Kim.

Additional information

Jung-Tak Bae is currently a Ph.D. student in Jeonbuk National University and his research field is related to 3-D, 5-D CNC machine center, EDM wire cutter and ultra-precision lapping process.

Han Joo Kim is currently a Professor of Convergence Tech. Eng. at Jeonbuk National University. His research interests are automotive parts and composite materials.

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Bae, J.T., Kim, H.J. Finishing characteristics of Inconel alloy 625 bars in ultra-precision magnetic abrasive finishing using CNC machine center. J Mech Sci Technol 35, 2851–2859 (2021). https://doi.org/10.1007/s12206-021-0608-y

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  • DOI: https://doi.org/10.1007/s12206-021-0608-y

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