Investigations on Surface Integrity and Electrochemical Behavior of Machined Co-Cr-Mo Bio-implant Alloy

Subject Areas : Mechanical Engineering

K. A.  Jagtap ¹ (Research Scholar, Department of Mechanical Engineering, Dr. Babasaheb Ambedkar Technological University, Lonere, Raigad, MS, India)
R. S.  Pawade ² (Associate Professor, Department of Mechanical Engineering, Dr. Babasaheb Ambedkar Technological University, Lonere, Raigad, MS, India)
K. V.  Giradkar ³ (PG Student, Department of Mechanical Engineering, Dr. Babasaheb Ambedkar Technological University, Lonere, Raigad, MS, India)

Received: 2016-08-06 Accepted : 2016-11-03 Published : 2016-12-24

Keywords: 6 August 2016, Accepted: 3 November 2016, Revised: 15 October 2016,

Abstract :

A decisive constraint for the long-term stability of the artificial joint is to minimize the release of debris particles. The wear/debris induced osteolysis and aseptic loosening are the result of failure of metal-on-metal joint implants. SPD processes have been used to adapt the surface integrity properties by generating ultrafine or even nano-sized grains and grain size gradients in the surface region of work materials. These fine grained materials often show enhanced surface integrity properties and improved functional performance (wear resistance, corrosion resistance, fatigue life, etc.) compared with their predictable coarse grained counterparts. To identify the implant material’s post machined behaviour in biological environment, the experiments were planned by precision CNC turning process and accordingly post machined surfaces were analyzed by contact type and electrochemical measurement processes. The work includes effect of machining parameters on machined surface roughness and corrosion rate by an electrochemistry of Co-Cr-Mo bio-implant alloy. The minimum machined surface roughness value 0.450 µm shows minimum corrosion rate as 0.00002 mm/year. It is also shown that feed rate is having predominating effect on machined surface roughness and rake angle is on corrosion rate of Co-Cr-Mo bio-implant alloy.

References:

[1]   Geetharani M, Nobu V, L D T Topoleski, ‘Wear of Sliding on Carbide Co-Cr-Mo Implant Alloy’, Technical Report, Arthritis Foundation, 2002.

[2]    Nevelos J., Shelton J. C. and Fisher J., ‘Metallurgical Considerations in the Wear of Metal-On-Metal Hip Bearings’, Hip International 14(1), 2004, pp 1-10.

[3]     L Reclaru, H Luthy, P Y Eschler, A. Blatter, O Loeffel and M H Zurcher, ‘Cobalt-Chromium Dental Alloys Enriched With Precious Metals’, European Cells and Materials Vol. 7 suppl. 2, 2004, pp 51-52.

[4]   Howie D. W., McCalden R. W., Nawana N. S., Costi K., Pearcy M. J. and Subramanian, C., ‘The Long-Term Wear of Retrieved McKee-Farrar Metalon- Metal total Hip Prostheses’, Journal of Arthroplasty, 20(3), 2005, pp 350-357.

[5]     Affatato S., Bersaglia G., Yin J. Q., Traina F., Toni, A. and Viceconti M., ‘The predictive Power of Surface Profile Parameters on the Amount of Wear Measured in Vitro on Metal-On-Polyethylene Artificial Hip Joints’, Proceedings of the Institution of Mechanical Engineers Part H-Journal of Engineering in Medicine, 220(H3), 2006, pp 457-464.

[6]   H Ohmori, K Katahira, Y Akinou, J Komotori and M Mizutani, ‘Investigation on Grinding Characteristics and Surface Modifying Effects of Biocompatible Co-Cr Alloy’, Annals of CIRP, Vol. 55, 2006, pp 156-161.

[7]    S H Lee, N Nomura and A Chiba, ‘Microstructures and Mechanical Properties of Biomedical Co-Cr-Mo Alloys With Combination of N Addition and Cr-Enrichment’, Lst Asian Biomaterials Congress, Dec. 6-8, 2007, Tsukuba, Japan.

[8]  Grgazka Dahlke M, Dabrowski JR, Dabrowski B, ‘Modification of Mechanical Properties of Sintered Implant Materials on the Base of Co-Cr-Mo Alloy’, J Mater Process Technology, 2008, pp 199–205.

[9]     Young Chan Songa, Chun Hong Parka and Toshimichi Moriwaki, ‘Mirror Finishing of Co–Cr–Mo Alloy Using Elliptical Vibration Cutting’, Journal of Precision Engineering, 34, 2010, pp 784-789.

[10] Shu Yang, ‘Cryogenic Burnishing of Co-Cr-Mo Biomedical Alloy for Enhanced Surface Integrity and Improved Wear Performance’, PhD thesis, University of Kentucky, China, 2012.

[11]  M. S. Uddin, ‘On the Influence and Optimization of Cutting Parameters in Finishing of Metallic Femoral Heads of Hip Implants’, International Journal of Advanced Manufacturing Technology, (2014) 73, pp 1523-1532.

[12] L. Jolla, A Model of Synovial Fluid Lubricant Composition in Normal and Injured Joints, Eur. Cells Mater. 13 (2007) pp 26–39.

[13]  L. Sundblad, The Chemistry of Synovial Fluid With Special Regard to Hyaluronic Acid., Acta Orthop. Scand. 20 (1950) pp 105–113.

[14] J. Necas, L. Bartosikova, P. Brauner, J. Kolar, Hyaluronic Acid (hyaluronan): A Review, Vet. Med. (Praha). 53 (2008) pp 397–411.

[15] F. Barry Decker, Mcguckin, F. Mckenzie, Concentration of Hyaluronic Fluid Acid in Synovial, Clin. Chem. 5 (1959) pp 465–469.

[16]  E. a Balazs, The Physical Properties of Synovial Fluid and the Specific Role of Hyaluronic Acid, Disord. Knee. (1982) pp 61–74.

[17]  D.H. Kohn, Metals in Medical Applications, Curr. Opin. Solid State Mater. Sci. 3 (1998) 309–316.

[18]  M. Lampin, C. Legris, M. Degrange, Correlation Between Substratum Roughness and Wettability , Cell Adhesion , and Cell Migration, J. Biomed. Mater. Res. 36 (1996) pp 99–108.

  [19]  R.S. Pawade, S.S. Joshi, P.K. Brahmankar, Effect of Machining Parameters and Cutting Edge Geometry on Surface Integrity of High Speed Turned Inconel 718, Int J. of Machine Tool and Mfg, Vol. 48, Issue 1, Jan. 2008, pp 15-28.