Structure, Strength and Ductility of As-Cast Al-Mg-Mn-Zr-Sc Alloys after Equal Channel Angular Pressing

Abstract:

The effect of equal channel angular pressing (ECAP) on the structure and mechanical properties of Al-4% Mg-1.5% Mn-0.4% Zr and Al-4% Mg-1.5% Mn-0.4% Zr-0.4% Sc alloys in the initial as-cast state was studied. The ECAP processing was shown to lead to the formation of predominantly submicrocrystalline structure with an average grain size of 850 nm in the Al-Mg-Mn-Zr-Sc alloy and 1060 nm in the Al-Mg-Mn-Zr alloy. It is remarkable that both strength and ductility of the two alloys were enhanced by ECAP. The highest strength was observed in the Al–Mg–Mn–Zr–Sc alloy (UTS = 425MPa), in combination with elongation to failure of EL=17 %.

• Periodical: Materials Science Forum (Volumes 633-634)
• Pages: 311-319
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.633-634.311
• Online since: November 2009
• Authors: Sergey V. Dobatkin, Yuri Estrin, Valerij V. Zakharov, T.D. Rostova, O.G. Ukolova, A. Tchirkova
• Keywords: Al-Mg-Sc-Zr Alloy, Ductility, Equal-Channel Angular Pressing (ECAP), Strength, Submicrocrystalline Structure

References

[1] R.Z. Valiev, and I.V. Alexandrov: Nanosructured Materials by Severe Plastic Deformation (Logos, Moscow, Russia 2000) (in Russian).

[2] Equal-Channel Angular Pressing of Metallic Materials: Thematic Issue edited by V.M. Segal, S.V. Dobatkin, and R.Z. Valiev: Part 1. Russian Metallurgy, Vol. 2004, No. 1 (2004).

[3] S. Komura, M. Furukawa, T G. Langdon, P. B. Berbon, M. Nemoto, and Z. Horita: Scripta Mater. Vol. 38 (1998), p.1851.

DOI: 10.1016/s1359-6462(98)00099-2

[4] T. Mukai, K. Higashi, T. G. Nieh, and H. Watanabe: Mater. Sci. Forum Vol. 304-306 (1999), p.109.

[5] M. Furukawa, A. Utsunomiya, K. Matsubara, Z. Horita, and T. G. Langdon: Acta Mater. Vol 49 (2001), p.3829.

[6] V.N. Perevezentsev, V. N. Chuvil'deev, V.I. Kopylov, A. N. Sysoev, and T. G. Langdon: Annales de Chimie Vol. 27 (2002), p.99.

[7] S. Lee, A. Utsunomiya, H. Akamatsu, K. Neishi, M. Furukawa, Z. Horita, and T. G. Langdon: Acta Mater. Vol. 50 (2002), p.553.

DOI: 10.1016/s1359-6454(01)00368-8

[8] R. Kaibyshev, O. Sitdikov, and S. Olenyov, in: Ultrafine Grained Materials II, edited by Y.T. Zhu, T.G. Langdon, R.S. Mishra, S. L. Semiatin, M. J. Saran, and T. C . Lowe, TMS (The Minerals, Metals & Materials Society), (2002), p.65.

DOI: 10.1002/9781118804537

[9] V.N. Perevezentsev, V. N. Chuvil'deev, V.I. Kopylov, A. N. Sysoev, and T. G. Langdon: Russian Metallurgy, Vol. 2004, No. 1 (2004), p.28.

[10] M.E. Drits, M.E. Turkina, E.S. Kadaner, and T.V. Dobatkina, in: Rare Metals in Non-Ferrous Alloys ( Nauka, Moscow, USSR 1975), с. 160 (in Russian).

[11] M.E. Drits, S.G. Pavlenko, L.S. Toropova et al: DAN SSSR Vol. 257, No. 2 (1981), p.353 (in Russian).

[12] V.I. Yelagin, V.V. Zakharov, and T.D. Rostova: Non-Ferrous Metals No. 12 (1982), p.96 (in Russian).

[13] V.I. Yelagin, V.V. Zakharov, and T.D. Rostova: MiTOM No. 7 (1983), p.57 (in Russian).

[14] Yu.A. Filatov: Journal of Advanced Mat. No. 5 (1995), p.386.

[15] T.D. Rostova, V.G. Davydov, V.I. Yelagin, and V.V. Zakharov: Materials Science Forum Vol. 331-337 (2000), p.793.

DOI: 10.4028/www.scientific.net/msf.331-337.793

[16] V.G. Davydov, T.D. Rostova, V.V. Zakharov et al: Mat. Sci. Eng. A 280 (2000), p.30.

[17] L.S. Toropova, D.G. Eskin, M.L. Kharakterova, and T.V. Dobatkina: Advanced Aluminium Alloys Containing Scandium: Structure and Properties (Gordon and Breach Science Publishers, Amsterdam, The Netherlands 1998).

DOI: 10.4324/9781315097541

[18] S.V. Dobatkin, J.A. Szpunar, A.P. Zhilyaev, J. -Y. Cho, and A.A. Kuznetsov: Materials Science and Engineering A 418 (2006), p.148.

[19] R.Z. Valiev: Nature Mater. 3 (2004), p.511.

[20] S.V. Dobatkin, V.V. Zakharov and R.Z. Valiev, in: Recrystallization and Grain Growth, edited by G. Gottstein, and D.A. Molodov, Spinger-Verlag (2001), p.509.