Abstract
Mg alloys have unique characteristics such as high specific strength, low density, high corrosion rate, etc., as functional as well as structural materials. Mg-Zn alloys have good biocompatibility because Mg and Zn are abundant nutritional elements in the human’s body. However, Mg alloys with multi-phase cause galvanic corrosion by corrosion potential differences among constituent phases. Therefore, the application of Mg alloys on bio-material parts are limited.
In this study, bio-corrosion properties of Mg-Zn-Mn alloys according to the solid solution and distribution of phases by various Mn contents and heat treatment condition were evaluated. The results of tensile and in-vitro corrosion tests indicated that tensile and bio-corrosion properties could be adjusted by controlling the Mn contents and heat treatment. The tensile yield strength (TYS), ultimate tensile strength (UTS) and Elongation of Mg-Zn-Mn alloys increased up to 0.5 wt.% and then slightly decreased with Mn contents. However, TYS, UTS, and Elongation of T4 treated Mg-Zn-Mn alloys increased with increasing Mn contents. When MgZn phase and Mn particle were dissolved in the matrix, bio-corrosion properties were improved in hank’s solution. From the results of immersion test, the Mg-3Zn-0.5Mn alloy has good corrosion properties at 2 steps T4 treatment.
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Yang, W., Yoon, YO., Kim, S.K., Lim, H.K., Kim, D.H. (2015). Effects of Heat Treatment on Bio-Corrosion Properties of Mg-Zn-xMn (x= 0.5, 1.0, and 1.5 wt.%) Alloys as Biodegradable Materials. In: Manuel, M.V., Singh, A., Alderman, M., Neelameggham, N.R. (eds) Magnesium Technology 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48185-2_76
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DOI: https://doi.org/10.1007/978-3-319-48185-2_76
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48611-6
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