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

43 Citations (Scopus)

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 - Apr 24 2012

Fingerprint

Shot peening
Calcium alloys
Corrosion resistance
Body fluids
Magnesium alloys
Lasers
Corrosion
Orthopedics
Surface topography
Compressive stress
Strain hardening
Biomaterials
Magnesium
Calcium
Residual stresses

Keywords

  • Corrosion
  • Laser
  • Surface integrity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening. / Guo, Yuebin; Sealy, Michael P.; Guo, Changsheng.

In: CIRP Annals - Manufacturing Technology, Vol. 61, No. 1, 24.04.2012, p. 583-586.

Research output: Contribution to journalArticle

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