Enabling High-Performance Surfaces of Biodegradable Magnesium Alloys via Femtosecond Laser Shock Peening with Ultralow Pulse Energy
- 26 October 2021
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Bio Materials
- Vol. 4 (11), 7903-7912
- https://doi.org/10.1021/acsabm.1c00826
Abstract
The fast degradation rate and poor wear resistance of magnesium (Mg) alloys in physiological environments have limited their potential usage as next-generation biodegradable orthopedic implant materials. In this work, femtosecond laser shock peening (fs-LSP) was successfully applied to simultaneously improve the surface mechanical, corrosion, and tribocorrosion properties of WE43 Mg alloys in blood bank buffered saline solution at body temperature. Specifically, the treated surfaces of WE43 Mg alloys via fs-LSP with ultralow pulse energy were investigated under different power densities, confining mediums, and absorbent materials. It was found that the combination of a black tape and a quartz layer gave the optimum peening effect under a power density of 28 GW/cm2, which simultaneously strengthened the surface and reduced the corrosion kinetics. In addition, a rapid self-repassivation was observed in fs-LSP-treated WE43 surfaces during tribocorrosion, promising sustained corrosion resistance under mechanical loading, critical to the reliability of load-bearing implants. Finally, the subsurface microstructural evolution and residual stress development in WE43 after fs-LSP were discussed based on the results from transmission electron microscopy analysis and finite element simulations.Keywords
Funding Information
- Air Force Office of Scientific Research (FA9550-18-1-0263)
- Division of Civil, Mechanical and Manufacturing Innovation (CMMI-1855651)
This publication has 55 references indexed in Scilit:
- A review on in vitro corrosion performance test of biodegradable metallic materialsTransactions of Nonferrous Metals Society of China, 2013
- Evolution of hydrogen at dissolving magnesium surfacesCorrosion Science, 2013
- A two-dimensional comprehensive hydrodynamic model for femtosecond laser pulse interaction with metalsJournal of Physics D: Applied Physics, 2012
- Corrosion fatigue behaviors of two biomedical Mg alloys – AZ91D and WE43 – In simulated body fluidActa Biomaterialia, 2010
- Metallic materials for biomedical applications: Laboratory and clinical studiesPure and Applied Chemistry, 2010
- In vivo corrosion of four magnesium alloys and the associated bone responseBiomaterials, 2005
- Magnesium deficiency and osteoporosis: animal and human observationsThe Journal of Nutritional Biochemistry, 2004
- Laser shock processing and its effects on microstructure and properties of metal alloys: a reviewInternational Journal of Fatigue, 2002
- Creep, fatigue and oxidation in crack growth in advanced nickel base superalloysInternational Journal of Fatigue, 2001
- Bioresorbable implants — practical considerationsBone, 1996