Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening

Yuebin Guo, Michael P. Sealy, Changsheng Guo

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Biodegradable magnesium-calcium alloys are attractive new orthopedic biomaterials compared to conventional permanent implant alloys. However, magnesium-calcium alloys corrode too fast in human body fluids. This study explores the process capability of laser shock peening (LSP) to control the corrosion of magnesium-calcium implants by tailoring the surface integrity. LSP induced unique surface topographies, highly compressive residual stresses, and extended strain hardening significantly enhanced the corrosion resistance of the alloy by more than 100-fold in simulated body fluid. Furthermore, corrosion of the peened implants was controllable by varying the laser power and peening overlap ratio.

Original languageEnglish (US)
Pages (from-to)583-586
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume61
Issue number1
DOIs
StatePublished - 2012

Keywords

  • Corrosion
  • Laser
  • Surface integrity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening'. Together they form a unique fingerprint.

  • Cite this