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Effect of cryogenic burnishing on surface integrity modifications of Co-Cr-Mo biomedical alloy

Authors

  • Shu Yang,

    Corresponding author
    1. Department of Mechanical Engineering and Institute for Sustainable Manufacturing, University of Kentucky, Lexington, Kentucky 40506
    • Department of Mechanical Engineering and Institute for Sustainable Manufacturing, University of Kentucky, Lexington, Kentucky 40506
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  • Oscar W. Dillon Jr.,

    1. Department of Mechanical Engineering and Institute for Sustainable Manufacturing, University of Kentucky, Lexington, Kentucky 40506
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  • David A. Puleo,

    1. Center for Biomedical Engineering, Wenner-Gren Laboratory, University of Kentucky, Lexington, Kentucky 40506
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  • Ibrahim S. Jawahir

    1. Department of Mechanical Engineering and Institute for Sustainable Manufacturing, University of Kentucky, Lexington, Kentucky 40506
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  • How to cite this article: Yang S, Dillon OW Jr., Puleo DA, Jawahir IS. 2013. Effect of cryogenic burnishing on surface integrity modifications of Co-Cr-Mo biomedical alloy. J Biomed Mater Res Part B 2013:101B:139–152.

Abstract

Severe plastic deformation (SPD) processes have been used to modify the surface integrity properties of many materials by generating ultrafine or even nanometer-sized grains in the surface and subsurface region. These fine grained materials created by SPD and dynamic recrystallization in a thin layer near the surface usually have higher hardness and frequently exhibit enhanced mechanical properties (wear resistance, corrosion resistance, fatigue life, etc.). Cryogenic burnishing, a SPD process, was used to improve several surface integrity parameters of a Co-Cr-Mo biomedical alloy. Application of liquid nitrogen during the burnishing process significantly suppressed the temperature rise within and outside the nitrogen application zone. Better surface finish, high hardness value, thick burnishing-influenced surface layer, and significant grain refinement were simultaneously achieved with the application of cryogenic cooling. Current results show that cryogenic burnishing can be an effective processing method for modifying the studied surface integrity properties of Co-Cr-Mo biomedical alloy. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 101B: 139–152, 2013.

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