Surface integrity of biodegradable Magnesium-Calcium (Mg-Ca) alloy by low plasticity burnishing

M. Salahshoor, Y. B. Guo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

When a device is implanted into the body, into either hard or soft tissue, the body will respond. While the bulk material of the device is often important for integrity and mechanical success, the device surface is at the interface with biology. Major effort has been spent modifying a biomaterial surface in order to elicit or inhibit a biological response. Metallic biodegradable Magnesium-Calcium (Mg-Ca) alloys have attracted an increased attention for orthopedic fixation applications. This research focuses on low plasticity burnishing (LPB) as a novel surface modification technique that is added to the surface to control biodegradation as a biological response. The effects of burnishing pressure as an important process parameter on surface integrity characteristics such as surface roughness, surface topography, and residual stresses are investigated. Burnished surface roughness is smaller than the machined ones. However, some amount of waviness is observed which might be due to large diameter of the burnishing ball and sever plastic deformation. High compressive residual stresses are measured on the burnished surface.

Original languageEnglish (US)
Title of host publicationSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010
Pages61-63
Number of pages3
DOIs
Publication statusPublished - Dec 1 2010
Externally publishedYes
EventSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010 - San Francisco, CA, United States
Duration: Oct 17 2010Oct 20 2010

Publication series

NameAmerican Society of Mechanical Engineers, Tribology Division, TRIB

Conference

ConferenceSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010
CountryUnited States
CitySan Francisco, CA
Period10/17/1010/20/10

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Materials Science(all)

Cite this

Salahshoor, M., & Guo, Y. B. (2010). Surface integrity of biodegradable Magnesium-Calcium (Mg-Ca) alloy by low plasticity burnishing. In STLE/ASME 2010 International Joint Tribology Conference, IJTC2010 (pp. 61-63). (American Society of Mechanical Engineers, Tribology Division, TRIB). https://doi.org/10.1115/IJTC2010-41214