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

Yuebin Guo; Michael P. Sealy; Changsheng Guo

doi:10.1016/j.cirp.2012.03.125

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 journal › Article › peer-review

66 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 language	English (US)
Pages (from-to)	583-586
Number of pages	4
Journal	CIRP Annals - Manufacturing Technology
Volume	61
Issue number	1
DOIs	https://doi.org/10.1016/j.cirp.2012.03.125
State	Published - 2012
Externally published	Yes

Keywords

Corrosion
Laser
Surface integrity

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cirp.2012.03.125

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title = "Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening",

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.",

keywords = "Corrosion, Laser, Surface integrity",

author = "Yuebin Guo and Sealy, {Michael P.} and Changsheng Guo",

note = "Funding Information: This research is based upon the work supported by NSF under Grant No. CMMI-1000706 .",

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doi = "10.1016/j.cirp.2012.03.125",

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T1 - Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening

AU - Guo, Yuebin

AU - Sealy, Michael P.

AU - Guo, Changsheng

N1 - Funding Information: This research is based upon the work supported by NSF under Grant No. CMMI-1000706 .

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - Corrosion

KW - Laser

KW - Surface integrity

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

Abstract

Keywords

ASJC Scopus subject areas

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