Effect of Hot Extrusion and Cyclic Extrusion Compression Progress on the Microstructures and Properties of Mg-Zn-Y-Nd Alloy

Abstract:

Magnesium alloys are promising candidate materials for cardiovascular stents due to their good biocompatibility and degradation property in human body. However, in vivo tests also show that improvement in mechanical property and corrosion resistance is necessary for wide application. In this study, hot extrusion and cyclic extrusion compression (CEC) were used on Mg-Zn-Y-Nd alloy, the effects of hot extrusion and CEC process on the microstructures, mechanical properties and corrosion properties of alloy were studied. The results showed that the microstructures of CEC treated Mg-Zn-Y-Nd alloy became finer and more homogenous, some nanoparticles which came from the cluster phase uniformly precipitated inside grains, alloy had good mechanical properties and corrosion resistance. The immersion test results in SBF solution at 37 for 24h showed that the alloy after CEC treatment is uniform corrosion.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 28-32
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.28
• Online since: February 2013
• Authors: Shi Jie Zhu, Qiong Wu, Li Guo Wang, Qian Liu, Gao Chao Yue, Shaokang Guan
• Keywords: Cyclic Extrusion Compression, Hot Extrusion, Mg-Zn-Y-Nd Alloy, Vascular Stent

References

[1] G. Mani, M.D. Feldman, D. Patel, et al., Coronary stents: a materials perspective, Biomaterials. 28 (2007) 1689-710.

DOI: 10.1016/j.biomaterials.2006.11.042

[2] G.L. Song, Control of biodegradation of biocompatible magnesium alloys, Corro. Sci. 49 (2007) 1696-1701.

[3] A.C. Hänzi, F.H. Dalla Torre, A.S. Sologubenko, et al., Design strategy for microalloyed ultra-ductile magnesium alloys, Philos. Mag. Lett. 89 (2009) 377-390.

DOI: 10.1080/09500830902960125

[4] A.C. Hänzi, A.S. Sologubenko, et al., Design strategy for new bioabsorbable Mg-Y-Zn alloys for medical applications, Int J Mater Res. 100 (2009) 1127-1136.

DOI: 10.3139/146.110157

[5] K.Y. Chiu, M.H. Wong, F.T. Cheng, et al., Characterization and corrosion studies of fluoride conversion coating on degradable Mg implants, Surf. Coat. Technol. 202 (2007) 590-598.

DOI: 10.1016/j.surfcoat.2007.06.035

[6] C.S. Wu, Z. Zhang, F.H. Cao, et al., Study on the anodizing of AZ31 magnesium alloys in alkaline borate solutions, Appl. Surf. Sci. 253 (2007) 3893-3898.

DOI: 10.1016/j.apsusc.2006.08.020

[7] Y.J. Zhang, C.W. Yan, F.H. Wang, et al., Electrochemical behaviour of anodized Mg alloy AZ91D in chloride containing aqueous solution, Corro. Sci. 47 (2005) 2816-2831.

DOI: 10.1016/j.corsci.2005.01.010

[8] J.H. Gao, S.K. Guan, Z.W. Ren, et al., Homogeneous corrosion of high pressure torsion treated Mg-Zn-Ca alloy in simulated body fluid, Mater. Lett. 65 (2011) 691-693.

DOI: 10.1016/j.matlet.2010.11.015

[9] Y.J. Chen, Q.D. Wang, H.J. Roven, et al., Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression, J. Alloys Compd. 462 (2008) 192-200.

DOI: 10.1016/j.jallcom.2007.07.116

[10] J.B. Lin, Q.D. Wang, Y.J. Chen, et al., Microstructure and texture characteristics of ZK60 Mg alloy processed by cyclic extrusion and compression, Trans. Nonferrous Met. Soc. 20 (2010) 2081-(2085).

DOI: 10.1016/s1003-6326(09)60421-0

[11] T. Peng, Q.D. Wang, J.B. Lin, et al., Microstructure and enhanced mechanical properties of an Mg-10Gd-2Y-0. 5Zr alloy processed by cyclic extrusion and compression, Mater. Sci. Eng., A. 258(2011) 1143-1148.

DOI: 10.1016/j.msea.2010.09.097