Lopes, Debora R., Silva, Claudio L.P., Soares, Renata B., Pereira, Pedro Henrique R., Oliveira, Ana Celeste, Figueiredo, Roberto B., Langdon, Terence G. and Lins, Vanessa F.C. (2019) Cytotoxicity and corrosion behavior of magnesium and magnesium alloys in Hank's Solution after processing by high-pressure torsion. Advanced Engineering Materials, 21 (8), 1-9, [1900391]. (doi:10.1002/adem.201900391).
Abstract
It is well-known that processing by severe plastic deformation using high-pressure torsion (HPT) promotes grain refinement and increases the strength of magnesium and its alloys. The present research is conducted to evaluate the effect of such processing on cytotoxicity and corrosion behavior in Hank's solution by using samples of commercial purity magnesium and AZ31, AZ91, and ZK60 magnesium alloys. All samples are subjected to electrochemical testing and hydrogen evolution testing before and after processing by HPT and the results show that this processing improves the corrosion resistance of pure magnesium, has no significant effect on the AZ31 and AZ91 alloys but reduces the corrosion resistance of the ZK60 alloy. The observations support the conclusion that grain refinement improves the corrosion resistance of metals with a tendency for passivation but impedes the resistance of metals without passivation. In addition, in vitro cytotoxicity tests are performed on the processed materials and show cell viability in all samples. The results demonstrate that HPT processing may be used to improve the performance of magnesium and its alloys as biodegradable implants.
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- Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Mechanical Engineering > Engineering Materials and Surface Engineering Group
Mechanical Engineering > Engineering Materials and Surface Engineering Group - Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Mechanical Engineering (pre 2018 reorg) > Bioengineering Group (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Mechanical Engineering > Mechanical Engineering (pre 2018 reorg) > Bioengineering Group (pre 2018 reorg)
Mechanical Engineering > Mechanical Engineering (pre 2018 reorg) > Bioengineering Group (pre 2018 reorg)
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