Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-26T16:52:25.328Z Has data issue: false hasContentIssue false
  • English
  • Français

A high-strength extruded Mg–Gd–Zn–Zr alloy with superplasticity

Published online by Cambridge University Press:  31 January 2011

Y.J. Wu ,
L.M. Peng ,
X.Q. Zeng ,
D.L. Lin  and
W.J. Ding
L.M. Peng*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
X.Q. Zeng
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
D.L. Lin
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
W.J. Ding
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

This article presents an extruded Mg–Gd–Zn–Zr alloy produced by conventional ingot metallurgy, exhibiting high-strength and excellent ductility at room and elevated temperatures. The superplastic behavior was observed in the Mg–Gd–Zn (–Zr) alloy at elevated temperatures above 573 K. In the alloy, both the X phase in grain boundaries and the lamellae within matrix have the 14H-type long-period, stacking-ordered structure. It indicates that the X phase and the lamellae within matrix play important roles in the excellent mechanical properties.

Keywords

ExtrusionMgSuperplasticity
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3596 - 3602
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.He, S.M., Zeng, X.Q., Peng, L.M., Gao, X., Nie, J.F., and Ding, W.J.: Precipitation in a Mg–10Gd–3Y–0.4Zr (wt.%) alloy during isothermal aging at 250°C. J. Alloys Compd. 421, 309 (2006).CrossRefGoogle Scholar
2.Gao, X. and Nie, J.F.: Enhanced precipitation-hardening in Mg–Gd alloys containing Ag and Zn. Scr. Mater. 58, 619 (2008).CrossRefGoogle Scholar
3.Ding, W.J., Wu, Y.J., Zeng, X.Q., Peng, L.M., Yuan, G.Y., and Lin, D.L.: Formation of 14H-type long period stacking ordered structure in the as-cast and solid-solution-treated Mg–Gd–Zn–Zr alloys. J. Mater. Res. 24(5), 1842 (2009).Google Scholar
4.Wu, Y.J., Zeng, X.Q., Lin, D.L., Peng, L.M., and Ding, W.J.: The microstructure evolution with lamellar 14H-type LPSO structure in an Mg96.5Gd2.5Zn1 alloy during solid solution heat treatment at 773K. J. Alloys Compd. 447, 193 (2009).CrossRefGoogle Scholar
5.Wu, Y.J., Lin, D.L., Zeng, X.Q., Peng, L.M., and Ding, W.J.: Formation of a lamellar 14H-type long period stacking ordered structure in an as-cast Mg–Gd–Zn–Zr alloy. J. Mater. Sci. 44, 1607 (2009).CrossRefGoogle Scholar
6.Luo, Z.P. and Zhang, S.Q.: High-resolution electron microscopy on the X-Mg12ZnY phase in a high strength Mg–Zn–Zr–Y magnesium alloy. J. Mater. Sci. Lett. 19, 813 (2000).CrossRefGoogle Scholar
7.Inoue, A., Kawamura, Y., and Matsushita, M.: Novel hexagonal structure and ultrahigh strength of magnesium solid solution in the Mg–Zn–Y system. J. Mater. Res. 16, 1894 (2001).CrossRefGoogle Scholar
8.Kawamura, Y., Hayashi, K., Inoue, A., and Masumoto, T.: Rapidly solidified powder metallurgy Mg97Zn1Y2 alloys with excellent tensile yield strength above 600MPa. Mater. Trans. 42, 1172 (2001).CrossRefGoogle Scholar
9.Abe, E., Kawamura, Y., Hayashi, K., and Inoue, A.: Long-period ordered structure in a high-strength nanocrystalline Mg-1at%Zn-2at%Y alloy studied by atomic-resolution Z-contrast STEM. Acta Mater. 50, 3845 (2002).CrossRefGoogle Scholar
10.Nishida, M., Yamamuro, T., and Nagano, M.: Electron microscopy study of microstructure modifications in RS P/M Mg97Zn1Y2 alloy. Mater. Sci. Forum 419–422, 715 (2003).CrossRefGoogle Scholar
11.Morikawa, T., Kaneko, K., and Higashida, K.: The fine-grained structure in magnesium alloy containing long-period stacking order phase. Mater. Trans. 49(6), 1294 (2008).CrossRefGoogle Scholar
12.Chen, B., Lin, D.L., Zeng, X.Q., and Lu, C.: Microstructure and mechanical properties of ultrafine grained Mg97Y2Zn1 alloy processed by equal channel angular pressing. J. Alloys Compd. 440, 94 (2007).CrossRefGoogle Scholar
13.Wang, B.S., Liu, Y.B., and An, J.: Morphologies of microstructure in Mg97Y2Zn1 ribbon upon ageing at different temperatures. Mater. Trans. 49(8), 1768 (2008).CrossRefGoogle Scholar
14.Kawamura, Y., Morisaka, T., and Yamasaki, M.: Structure and mechanical properties of rapidly solidified Mg97Zn1RE2 alloys. Mater. Sci. Forum 419–422, 751 (2003).CrossRefGoogle Scholar
15.Itoi, T., Seimiya, T., Kawamura, Y., and Hirohashi, M.: Long period stacking structures observed in Mg97Zn1Y2 alloy. Scr. Mater. 51, 107 (2004).CrossRefGoogle Scholar
16.Kawamura, Y. and Yamasaki, M.: Formation and mechanical properties of Mg97Zn1RE2 alloys with long-period stacking ordered structure. Mater. Trans. 48(11), 2986 (2007).Google Scholar
17.Yamasaki, M., Sasaki, M., Nishijima, M., and Hiraga, K.: Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg–Zn–Gd alloys during isothermal aging at high temperature. Acta Mater. 55, 6798 (2007).CrossRefGoogle Scholar
18.Yamasaki, M., Anan, T., Yoshimoto, S., and Kawamura, Y.: Mechanical properties of warm-extruded Mg–Zn–Gd alloy with coherent 14H long periodic stacking bordered structure precipitate. Scr. Mater. 53, 799 (2005).Google Scholar
19.Yoshimoto, S., Yamasaki, M., and Kawamura, Y.: Microstructure and mechanical properties of extruded Mg–Zn–Y alloys with 14H long period ordered structure. Mater. Trans. 47(4), 959 (2006).CrossRefGoogle Scholar
20.Matsuda, M., Ti, S., Kawamura, Y., and Nishida, M.: Variation of long-period stacking order structures in rapidly solidified Mg97Zn1Y2. Mater. Sci. Eng., A 393, 269 (2005).Google Scholar
21.Amiya, K., Ohsuna, T., and Inoue, A.: Long-period hexagonal structures in melt-spun Mg97Ln2Y1 (Ln=Lanthanide metal) alloys. Mater. Trans. 44, 2151 (2003).CrossRefGoogle Scholar
22.Nishida, M., Kawamura, Y., Yamamura, T., and Inoue, A.: Formation process of unique microstructure in rapidly solidified Mg97Zn1Y2 alloy. Mater. Sci. Eng., A 375–377, 1217 (2004).CrossRefGoogle Scholar
23.Honma, T., Ohkubo, T., Kamado, S., and Hono, K.: Effect of Zn additions on the age-hardening of Mg–2.0Gd–1.2Y–0.2Zr alloys. Acta Mater. 55, 4137 (2007).Google Scholar
24.Perez, P., Gonzalez, S., Garces, G., Caruana, G., and Adeva, P.: High-strength extruded Mg96Ni2Y1RE1 alloy exhibiting superplastic behaviour. Mater. Sci. Eng., A 485, 194 (2008).Google Scholar
25.Tan, J.C. and Tan, M.J.: Superplasticity and grain boundary sliding characteristics in two stage deformation of Mg–3Al–1Zn alloy sheet. Mater. Sci. Eng., A 339, 81 (2003).CrossRefGoogle Scholar
26.Langdon, T.G.: Future research directions for interface engineering in high temperature plasticity. Mater. Sci. Eng., A 166, 237 (1993).Google Scholar