The Influence of SMAT and Polishing on the Degradation of AZ31B Magnesium Alloy in 3.5 Wt.% NaCl Solution

Abstract:

Surface mechanical attrition treatment (SMAT) has been recognized as a potential surface treatment for improving the strength and the wear resistance of magnesium (Mg) and its alloy. However, this treatment potentially increases the degradation rate of these particular materials. Therefore, additional treatments might be needed to overcome such limitation of the SMAT. In this research, the influence of polishing on the degradation of the SMAT-processed AZ31B Mg alloy was investigated. Weight losses measurement and pH monitoring were carried out to determine degradation behavior of the Mg alloy during an immersion test in 3.5 wt.% NaCl solution. The results showed that the degradability of the Mg alloy decreased with the application of polishing to remove the rough surface layer and the Fe contaminant on the material surface generated by the SMAT. Based on all the findings in this work, it can be concluded that the SMAT is indeed a promising technique for lowering the degradability of AZ31B Mg alloy, but such an advantage was masked by the increased roughness and contamination of the alloy surface with this treatment.

• Periodical: Key Engineering Materials (Volume 840)
• Pages: 377-382
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.840.377
• Online since: April 2020
• Authors: Budi Arifvianto*, Muslim Mahardika, Urip Agus Salim, Suyitno Suyitno
• Keywords: Degradation, Magnesium Alloy, NaCl Solution, Polishing, SMAT

References

[1] B.L. Mordike, T. Ebert, Magnesium: Properties-applications-potential, Mater. Sci. Eng. A 302 (2001) 37-45.

[2] J. Walker, S. Shadanbaz, T.B.F. Woodfield, M.P. Staiger, G.J. Dias, Magnesium biomaterials for orthopedic application: A review from a biological perspective, J. Biomed. Mater. Res. B Appl. Biomater. 102 (2014) 1316-1331.

DOI: 10.1002/jbm.b.33113

[3] Q. Chen, G.A. Thouas, Metallic implant biomaterials, Mater. Sci. Eng. R 87 (2015) 1-57.

[4] Y. Wei, B. Liu, L. Hou, B. Xu, G. Liu, Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment, J. Alloys Compd. 452 (2008) 336-342.

DOI: 10.1016/j.jallcom.2006.11.079

[5] M. Laleh, F. Kargar, Effect of surface nanocrystallization on the microstructural and corrosion characteristics of AZ91D magnesium alloy, J. Alloys Compd. 509 (2011) 9150-9156.

DOI: 10.1016/j.jallcom.2011.06.094

[6] H.Q. Sun, Y.N. Shi, M.X. Zhang, Sliding wear-induced microstructure evolution of nanocrystalline and coarse-grained AZ91D Mg alloy, Wear 266 (2009) 666-670.

DOI: 10.1016/j.wear.2008.08.004

[7] S. Xia, Y. Liu, D. Fu, B. Jin, J. Lu, Effect of surface mechanical attrition treatment on tribological behavior of the AZ31 alloy, J. Mater. Sci. Technol. 32 (2016) 1245-1252.

DOI: 10.1016/j.jmst.2016.05.018

[8] G. Chen, J. Gao, Y. Cui, H. Gao, X. Guo, S. Wu, Effects of strain rate on the low cycle fatigue behavior of AZ31B magnesium alloy processed by SMAT, J. Alloys Compd. 735 (2018) 536-546.

DOI: 10.1016/j.jallcom.2017.11.141

[9] D. Fabijanic, A. Taylor, K.D. Ralston, M.X. Zhang, N. Birbilis. Influence of surface mechanical attrition treatment attrition media on the surface contamination and corrosion of magnesium, Corrosion 69 (2013) 527-535.

DOI: 10.5006/0763

[10] N. Li, Y.D. Li, Y.X. Li, Y.H. Wu, Y.F. Zheng, Y. Han, Effect of surface mechanical attrition treatment on biodegradable Mg–1Ca alloy, Mater. Sci. Eng. C Mater. Biol. Appl. 35 (2014) 314-321.

DOI: 10.1016/j.msec.2013.11.010

[11] C.O. Hoog, N. Birbilis, Y. Estrin, Corrosion of pure Mg as a function of grain size and processing route, Adv. Eng. Mater. 10 (2008) 579-582.

DOI: 10.1002/adem.200800046

[12] B. Arifvianto, Suyitno, M. Mahardika, Degradation of mechanically surface treated AZ31B Magnesium alloy in 3.5 wt.% NaCl solution, Mater. Sci. Forum 948 (2019) 237-242.

DOI: 10.4028/www.scientific.net/msf.948.237

[13] N. Birbilis, K.D. Ralston, S. Virtanen, H.L. Fraser, C.H.J. Davies, Grain character influences on corrosion of ECAPed pure magnesium, Corros. Eng. Sci. Techn. 45 (2010) 224-230.

DOI: 10.1179/147842209x12559428167805

[14] B. Arifvianto, Suyitno, M. Mahardika, Surface morphology, roughness and wettability of the medical grade 316L stainless steel processed with surface mechanical attrition treatment and electropolishing for the preparation of osteosynthesis plate, J. Phys. Sci. 29 (2018) 83-94.

DOI: 10.21315/jps2018.29.3.7

[15] B. Arifvianto, Suyitno, M. Mahardika, P. Dewo, P.T. Iswanto, U.A. Salim, Effect of surface mechanical attrition treatment (SMAT) on microhardness, surface roughness and wettability of AISI 316L, Mater. Chem. Phys. 125 (2011) 418-426.

DOI: 10.1016/j.matchemphys.2010.10.038

[16] B. Arifvianto, Suyitno, M. Mahardika, Effect of sandblasting and surface mechanical attrition treatment on surface roughness, wettability, and microhardness distribution of AISI 316L, Key Eng. Mater. 462-463 (2011) 738-743.

DOI: 10.4028/www.scientific.net/kem.462-463.738

[17] A. Pardo, M.C. Merino, A.E. Coy, R. Arrabal, F. Viejo, E. Matykina, Corrosion behaviour of magnesium/aluminium alloys in 3.5 wt.% NaCl, Corros. Sci. 50 (2008) 823-834.

DOI: 10.1016/j.corsci.2007.11.005

[18] L. Wang, T. Shinohara, B.P. Zhang, H. Iwai, Characterization of surface products on AZ31 magnesium alloy in dilute NaCl solution, J. Alloys Compd. 485 (2009) 747-752.

DOI: 10.1016/j.jallcom.2009.06.071