Study on Microstructures and Mechanical Properties of Die Casting Mg-xGd-3Y-0.5Zr Alloys

Abstract:

In this paper, developed a non-aluminum die casting magnesium alloys were studied based on Mg-xGd-Y-Zr（x=6, 8, 12 wt.%）alloys in cold chamber press. The microstructures and mechanical properties of die casting GWK alloys have been investigated using OM, SEM, XRD, EDS and mechanical property test. The experimental results show that with increasing Gd content of Mg-xGd-Y-Zr alloys, the tensile strength increase, but elongation decrease. In particular, die casting GWK alloys after short-term and low-temperature solid solution treatment (T4) have a small variation in grain size and more uniform microstructures, and the second phases distribute at the grain boundaries in form of discontinuous rod shape or granule shape, which result in an obvious improvement in tensile mechanical properties of alloys. The Mg-12Gd-3Y-0.5Zr die casting alloy exhibit maximum tensile strength after solution heat treatment, and the value is 269MPa at room temperature. The effect of solution heat treatment on die casting Mg-xGd-Y-Zr alloys was also discussed.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 44-48
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.44
• Online since: May 2013
• Authors: Feng Wang, Zhi Wang, Zheng Liu, Ping Li Mao
• Keywords: Die Casting Magnesium Alloy, Mechanical Property, Mg-Gd-Y-Zr, Microstructure, Solution Heat Treatment

References

[1] B.L. Mordike, T. Ebert, Materials Science and Engineering. A302 (2001), pp.37-45

[2] B.L. Mordike, Journal of Materials Processing Technology. 117 (2001), pp.391-394

[3] J.H. Jun, B.-K. Park, J.-M. Kim, Materials Science Forum. 488/489 (2005), pp.107-110

[4] M. Socjusz-Podosek, L.Litynska, Materials Chemistry and Physics. 80 (2003), pp.472-475

[5] J.F. Nie, X. Gao, S.M. Zhu, Scripta Materialia.53 (2005), pp.1049-1053.

[6] Q.M. Peng, Y.M. Wu, D.Q. Fang, J. Meng, L.M. Wang, Journal of Alloys and Compounds. 430 (2007), pp.252-256

[7] S.M. He, X.Q. Zeng, L.M. Peng, Journal of Alloys and Compounds. 427 (2007), p.316–323

[8] S.M. He, X.Q. Zeng, L.M. Peng, Journal of Alloys and Compounds. 421 (1–2) (2006), p.309–313

[9] B. Smola, et al., Materials Science and Engineering. A 324 (2002),p.113

[10] P. Vostryi, et al., Physica Status Solidi. A 175 (1999) , p.491

[11] L.L. Rokhlin, Proceedings of NATO Advanced Study Institute, Kluwer1998, p.443.

[12] L.L. Rokhlin, N.I. Nikitina, Z. Metall. 85 (1994), p.819

[13] P.J. Aapps, H. Karimzadeh, J.F. King, G.W. Lorimer, Journal of Alloys and Compounds. 279 (1998), pp.1023-1028

[14] L.L. Rokhlin, Magnesium Alloys Containing Rare Earth Metals, Taylor and Francis, London, 2003, p.1

[15] S. Kamado, Y. Kojima, R. Ninomiya, K. Kubota, in: G.W. Lorimer (Ed.),Proceedings of the Third International Magnesium Conference, 1996, Institute of Materials, Manchester, UK, 1997, p.327

[16] I. Anthony, S. Kamado, Y. Kojima, Mater. Trans. 42 (2001) ,pp.1206-1212