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

Shu Yang, Oscar W. Dillon, David A. Puleo, Ibrahim S. Jawahir

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

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.

Original languageEnglish
Pages (from-to)139-152
Number of pages14
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume101 B
Issue number1
DOIs
StatePublished - Jan 2013

Keywords

  • cobalt-chromium (alloys)
  • cryogenic burnishing
  • surface characterization
  • surface modification

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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