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- Title
Influence of circumferential notch and fatigue crack on the mechanical integrity of biodegradable magnesium-based alloy in simulated body fluid.
- Authors
Bobby Kannan, M.; Singh Raman, R.K.; Witte, F.; Blawert, C.; Dietzel, W.
- Abstract
Applications of magnesium alloys as biodegradable orthopaedic implants are critically dependent on the mechanical integrity of the implant during service. In this study, the mechanical integrity of an AZ91 magnesium alloy was studied using a constant extension rate tensile (CERT) method. The samples in two different geometries that is, circumferentially notched (CN), and circumferentially notched and fatigue cracked (CNFC), were tested in air and in simulated body fluid (SBF). The test results show that the mechanical integrity of the AZ91 magnesium alloy decreased substantially (∼50%) in both the CN and CNFC samples exposed to SBF. Fracture surface analysis revealed secondary cracks suggesting stress corrosion cracking susceptibility of the alloy in SBF. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2011.
- Publication
Journal of Biomedical Materials Research, Part B: Applied Biomaterials, 2011, Vol 96B, Issue 2, p303
- ISSN
1552-4973
- Publication type
Article
- DOI
10.1002/jbm.b.31766