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Nanometric Finishing on Biomedical Implants by Abrasive Flow Finishing

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Abstract

Abrasive flow finishing (AFF) is a non-conventional finishing technique that offers better accuracy, efficiency, consistency, economy in finishing of complex/difficult to machine materials/components and provides the possibility of effective automation as aspired by the manufacturing sector. The present study describes the finishing of a hip joint made of ASTM grade Co–Cr alloy by Abrasive Flow Machining (AFM) process. The major input parameters of the AFF process were optimized for achieving nanometric finishing of the component. The roughness average (Ra) values were recorded during experimentation using surface roughness tester and the results are discussed in detail. The surface finished hip joints were characterized using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and residual stress analysis using X-Ray Diffraction (XRD). The discussion lays emphasis on the significance, efficacy and versatile nature of the AFF process in finishing of bio-medical implants.

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Acknowledgments

The authors are thankful to the Director, Central Manufacturing Technology Institute (CMTI), Bangalore for the continued support, encouragement and infrastructural facilities provided. The authors are also thankful to Indian Institute of Technology Kanpur and CMTI, Bangalore for setting up the prototype of AFM at CMTI, Bangalore. The authors would also like to thank Adler Mediequip Pvt. Ltd, Pune for providing the implants.

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Correspondence to Kavithaa Thirumalai Subramanian.

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Subramanian, K.T., Balashanmugam, N. & Shashi Kumar, P.V. Nanometric Finishing on Biomedical Implants by Abrasive Flow Finishing. J. Inst. Eng. India Ser. C 97, 55–61 (2016). https://doi.org/10.1007/s40032-015-0190-0

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