Preparation and Characterization of As-Cast and As-Extruded Mg-1Mn-0.6Ce-3Y Alloy

Abstract:

Mg-1Mn-0.6Ce-3Y alloy was prepared by metal mould casting method. The as-cast ingot was homogenized and then hot-extruded by an extrusion ratio of 16:1 at 380 °C. Microstructure and mechanical properties of the as-cast and hot-extruded samples were investigated. The results showed that the as-cast sample mainly consisted of α-Mg, Mg₁₂Ce, and Mg₂₄Y₅ phases. The average grain size of the sample homogenized at 380 °C was about 100μm, and it was greatly refined to about 6μm by dynamic recrystallization for the hot-extruded sample. The ultimate tensile strength, 0.2% yield strength and elongation of the hot-extruded sample were 244 MPa, 178 MPa and 37.5%, respectively. They were enhanced by 82%, 197% and 400%, correspondingly compared with those of the as-cast sample. The improvement of the strengths was attributed to the grain refinement, breakup of the precipitates and increase of the dislocation density.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 203-208
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.203
• Online since: March 2016
• Authors: Gui Hua Su, Xue Ran Liu, Zhan Yi Cao
• Keywords: Magnesium Alloy, Mechanical Properties, Microstructure, Yttrium

References

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

[2] J.L. Wang, N. Shi, L.D. Wang, Y.M. Wu, Z.Y. Cao, L.M. Wang, Preparation and characterization of As-cast and hot-rolled Mg-3Al-0. 5Mn-0. 5Zn-1MM alloy, Mater. Charact. 60(2009), 1507-1511.

DOI: 10.1016/j.matchar.2009.08.006

[3] J. Bohlen, M.R. Nurnberg, J.W. Senn, D. Letzig, S.R. Agnew, The texture and anisotropy of magnesium-zinc-rare earth alloy sheets, Acta Mater. 55(2007), 2101-2112.

DOI: 10.1016/j.actamat.2006.11.013

[4] L. Gao, H. Yan, J. Luo, Microstructure and mechanical properties of a high ductility Mg-Zn-Mn-Ce magnesium alloy, J of Magn. and Alloys. 1(2013) 283-291.

DOI: 10.1016/j.jma.2013.11.005

[5] Q.S. Yang, B. Jiang, X. Li, H.W. Dong, W.J. Liu, F.S. Pan, Microstructure and mechanical behavior of the Mg-Mn-Ce magnesium alloy sheets, J of Magn. and Alloys. 2(2014) 8-12.

DOI: 10.1016/j.jma.2014.01.009

[6] X. Zhang, D. Kevorkov, I-H. Jung, M. Pekguleryuz, Phase equilibria on the ternary Mg-Mn-Ce system at the Mg-rich corner, J. Alloys Compd. 482(2009), 420-428.

DOI: 10.1016/j.jallcom.2009.04.042

[7] L. Gao, A.A. Luo, Hot deformation behavior of as-cast Mg–Zn–Mn–Ce alloy in compression, Mater. Sci. Eng. A. 560(2013), 492-499.

DOI: 10.1016/j.msea.2012.09.094

[8] J. Zhao, K. Yu, X.Y. Xue, D.H. Mao, J.P. Li, Effects of ultrasonic treatment on the tensile properties and microstructure of twin roll casting Mg-3%Al-1%Zn-0. 8%Ce-0. 3%Mn (wt%) alloy strips, J. Alloys Compd. 509(2011), 8607-8613.

DOI: 10.1016/j.jallcom.2011.06.060

[9] W. Li, H. Zhou, P. Lin, S. Zhao, Microstructure and rolling capability of modified AZ31-Ce-Gd alloys, Mater. Charact. 60(2009), 1298-1304.

DOI: 10.1016/j.matchar.2009.06.003