Structure, Mechanical Properties and Corrosion Resistance of MgCa5 and MgCa5Zn1 Alloys after Plastic Deformation

Abstract:

Binary Mg-Ca and ternary Mg-Ca-Zn alloys are a new group of magnesium materials, which can be used in many goods. Among others, biomedical applications of these alloys mainly involved surgical implants in the form of plates or screws. In order to improve mechanical properties and corrosion resistance of Mg-based alloys with Ca and Zn addition in as-cast state a plastic deformation was applied by using the KOBO extrusion method. The microstructure studies conducted by scanning microscopy show that the structure of the alloys after the plastic deformation exhibits banding character and the bands are oriented in the direction of an extrusion. A significant increase of mechanical properties was observed for MgCa5Zn1 alloy. After the plastic deformation, the corrosion potential determined for the MgCa5 and MgCa5Zn1 alloy is shifted into the positive direction, which may suggest the increase of corrosion resistance. Moreover, the MgCa5 alloy in as-cast state was completely dissolved after 288 h of immersion in Ringer’s solution. A volume of hydrogen evolution for the same alloy after plastic deformation showed a value of 35 ml/cm².

• Periodical: Solid State Phenomena (Volume 275)
• Pages: 124-133
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.275.124
• Online since: June 2018
• Authors: Ryszard Nowosielski, Agnieszka Gawlas-Mucha, Rafał Babilas*
• Keywords: Corrosion Resistance, Hydrogen Evolution, Mg-Based Alloys, Plastic Deformation

References

[1] A. Dziadoń (ed.), Magnesium and its alloys, Monograph M28, Kielce University of Technology Press, Kielce, (2012).

[2] F. Witte, Reprint of: The history of biodegradable magnesium implants: A review, Acta Biomater. 23 (2015) 28-40.

[3] X.N. Gu, Y.F. Zheng, A review on magnesium alloys as biodegradable materials, Front. Mater. Sci. China 4 (2010) 111-115.

[4] Y.F. Zheng, X.N. Gu, F. Witte, Biodegradable materials, Mater. Sci. Eng. R 77 (2014) 1-34.

[5] N. Kirkland, N. Birbilis, J. Warker, T. Woodfield, G. Dias, M. Staiger, In-vitro dissolution of magnesium-calcium binary alloys: Clarifying the unique role of calcium additions in bioresorbable magnesium implant alloys, J. Biomed. Mater. Res. B Appl. Biomater. 95 (2010).

DOI: 10.1002/jbm.b.31687

[6] R. Nowosielski (ed.), Resorbable materials for medical implants, Monograph 665, Silesian University of Technology Press, Gliwice, (2017).

[7] H.R. Bakhsheshi-Rad, E. Hamzah, A. Fereidouni-Lotfabadi, M. Daroonparvar, M.A.M. Yajid, M. Mezbahul-Islam, M. Kasiri-Asgarani, M. Medraj, Microstructure and bio-corrosion behavior of Mg-Zn and Mg-Zn-Ca alloys for biomedical applications, J. Mater. Sci.: Mater. Med. 24 (2013).

DOI: 10.1002/maco.201307588

[8] E. Zhang, L. Yang, Microstructure, mechanical properties and bio-corrosion properties of Mg-Zn-Mn-Ca alloy for biomedical application, Mater. Sci. Eng. A 497 (2008) 111-118.

DOI: 10.1016/j.msea.2008.06.019

[9] W. Bochniak, A. Korbel, P. Ostachowski, S. Ziółkiewicz, J. Borowski, Extrusion of metals and alloys by KOBO method, Metals Forming 24 (2013) 83-97.

[10] W. Głuchowski, Z. Rdzawski, J. Stobrawa, Cu-Nb microcomposites with fibrous microstructure, Hutnik 78 (2011) 612-616.

[11] Z. Shi, A. Atrens, An innovative specimen configuration for the study of Mg corrosion, Corr. Sci. 53 (2011) 226-246.

DOI: 10.1016/j.corsci.2010.09.016

[12] A. Atrens, M. Liu, N.I.Z. Abidin, Corrosion mechanism applicable to biodegradable magnesium implants, Mater. Sci. Eng. B 176 (2011) 1609-1636.

DOI: 10.1016/j.mseb.2010.12.017

[13] R. Babilas, A. Bajorek, A. Radoń, R. Nowosielski, Corrosion study of resorbable Ca60Mg15Zn25 bulk metallic glasses in physiological fluids, Prog. Nat. Sci.: Mater. Inter. 27 (2017) 627-634.

DOI: 10.1016/j.pnsc.2017.08.011