|About this Abstract
||2012 TMS Annual Meeting & Exhibition
||Magnesium Technology 2012
||K-10: Effect of Grain Refinement and Texture Changes Induced by Burnishing on Corrosion Resistance of Magnesium Alloy for Biomedical Applications
||Z. Pu, S. Yang, G.-L. Song, O.W. Dillon, Jr., D. A. Puleo, I.S. Jawahir
|On-Site Speaker (Planned)
Magnesium alloys are emerging as an attractive candidate material for biodegradable implants including orthopedic implants and vascular stents. However, premature failure may occur due to their low corrosion resistance in physiological environments. In this study, the surface of AZ31B was burnished with a custom made tool under dry and liquid nitrogen spraying conditions. It was found that significant grain refinement occurred near the surface when using both burnishing conditions due to dynamic recrystallization induced by severe plastic deformation. In addition, a strong crystallographic basal texture was generated on the burnished surface. While the burnished surface was reported to have improved corrosion resistance in a corrosive NaCl solution by using hydrogen evolution method and electrochemical methods, contradictory results on corrosion performance were found in a simulated body fluid by the two methods. The possible causes of the disagreement are briefly discussed.
||Definite: A combination print-CD volume