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New structural and mechanical features of hexagonal materials after room temperature extrusion using the KoBo method

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Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 4

Abstract

The paper presents results of investigations on texture, microstructure and mechanical properties of magnesium alloy AZ31 and pure zinc after severe plastic deformation using the KoBo extrusion method at room temperature. The KoBo method combines monotonic metal deformation with cyclic changes of deformation path. It allows realization of an extrusion ratio equal to 100 (true strain ∊ = 4.6) at room temperature using a force of less than 1 MN. At the same time the grain structure is refined to the level of a few micrometers and the material attains unusually high mechanical properties not otherwise available regardless of the thermo-mechanical features.

Transmission electron microscopy observations in bright and dark field (weak beam technique) contrast conditions allowed identification of clusters of point defects in the extruded wires. In the light of these observations they are the only elements (nano-size elements) of the metals' structure which can be held responsible for the unusual properties of the wires.

Keywords: Magnesium alloy AZ31; Zinc; KoBo extrusion; Texture and structural evolution; Mechanical properties
* Correspondence address, Mr. Pawel Ostachowski, AGH – University of Science and Technology, Faculty of Non-Ferrous Metals, Department of Structure and Mechanics of Solids, A. Mickiewicza Av. 30, 30-059 Cracow, Poland. Tel.: +48 12 617 26 52, Fax: +48 12 632 56 15, E-mail:

References

[1] V.M.Segal: Mater. Sci. Eng. A197 (1995) 157.10.1016/0921-5093(95)09705-8Search in Google Scholar

[2] Y.Iwahashi, J.T.Wang, Z.Horita, M.Nemoto, T.G.Langdon: Scripta Mater.35 (1996) 143.Search in Google Scholar

[3] Y.Iwahashi, Z.Horita, M.Nemoto, T.G.Langdon: Acta Mater.46 (1998) 3317.Search in Google Scholar

[4] M.Furukawa, Z.Horita, M.Nemoto, T.G.Langdon: J. Mater. Sci.36 (2001) 2835.Search in Google Scholar

[5] V.M.Segal: Mater. Sci. Eng. A338 (2002) 331.10.1016/S0921-5093(02)00066-7Search in Google Scholar

[6] M.V.Markushev, C.C.Bampton, M.Y.Murashkin, D.A.Hardwick: Mater. Sci. Eng. A234–236 (1997) 927.Search in Google Scholar

[7] J.Richert, M.Richert: Aluminium62 (1986) 604.Search in Google Scholar

[8] M.Richert, J.Richert, J.Zasadziñski, S.Hawryłkiewicz, J.Dlugopolski: Mater. Chem. Physics81 (2003) 528.Search in Google Scholar

[9] P.W.Bridgeman: Studies in large plastic flow and fracture, McGrow Hill–New York (1952).Search in Google Scholar

[10] A.P.Zhilyaev, S.Lee, G.V.Nurislamova, R.Z.Valiev, T.G.Langdon: Scripta Mater.44 (2001) 2753.Search in Google Scholar

[11] A.P.Zhilyaev, G.V.Nurislamova, B.K.Kim, M.D.Baro, J.A.Szpunar, T.G.Langdon: Acta Mater.51 (2003) 753.Search in Google Scholar

[12] Z.Lee, F.Zhou, R.Z.Valiev, E.J.Lavernia, S.R.Nutt: Scripta Mater.51 (2004) 209.Search in Google Scholar

[13] T.G.Langdon, M.Frukawa, M.Nemoto, Z.Horita: JOM4 (2000) 30.Search in Google Scholar

[14] T.C.Lowe, R.Z.Valiev: JOM10 (2004) 64.Search in Google Scholar

[15] A.Korbel, W.Bochniak: Scripta Mater.51 (2004) 755.Search in Google Scholar

[16] W.Bochniak, K.Marszowski, A.Korbel: J. Mater. Proc. Technol.169 (2005) 44.Search in Google Scholar

[17] A.Korbel, W.Bochniak: European Patent Nr. 0711210, U.S. Patent Nr. 573959.Search in Google Scholar

[18] A.Korbel, W.Bochniak, P.Ostachowski, L.Błaz: Visco–plastic flow of metal in dynamic conditions of complex strain scheme, submitted for publication in Metallurgical and Materials Transaction.Search in Google Scholar

[19] J.Pospiech, A.Korbel, J.Bonarski, W.Bochniak, L.Tarkowski: Mater. Sci. Forum584–586 (2008) 565.Search in Google Scholar

[20] K.Pieła, W.Bochniak, A.Korbel, P.Ostachowski, L.Błaz: Rudy i Metale Nieżelazne54 (2009) 356.Search in Google Scholar

[21] A.Korbel, W.Bochniak: J. Mater. Proc. Technol.53 (1995) 229.Search in Google Scholar

[22] W.Bochniak, A.Korbel: Mater. Sci. Technol.16 (2000) 664.Search in Google Scholar

[23] A.Walocha, A.Korbel, W.Bochniak, P.Ostachowski: Rudy i Metale Nieżelazne54 (2009) 773.Search in Google Scholar

[24] G.Thomas, M.J.Goringe: Transmission microscopy of materials, John Wiley&Sons, New York (1979).Search in Google Scholar

[25] X.Zhang, H.Wang, R.O.Scattergood, J.Narayan, C.C.Koch: Acta Mater.50 (2002) 3995.Search in Google Scholar

Received: 2010-5-10
Accepted: 2011-2-6
Published Online: 2013-06-11
Published in Print: 2011-04-01

© 2011, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110490
Keywords for this article
Magnesium alloy AZ31; Zinc; KoBo extrusion; Texture and structural evolution; Mechanical properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the evolution of microstructure in oxygen-free high conductivity copper during thermo-mechanical processing using rotary swaging
  5. Phase-field simulation of diffusion couples in the Ni–Al system
  6. Finnis–Sinclair potentials for fcc Au–Pd and Ag–Pt alloys
  7. Hollow pyramidal lattice truss structures
  8. Synthesis of single-phase polycrystalline Ca2Si powder and sintered compacts
  9. On the micromechanics of die compaction of composite powder materials
  10. Structural, thermal, electrical and mechanical properties of nanosilica-composite polymer electrolytes
  11. The effects of tool rotation speed and traverse speed on friction stir welding of AISI 304 austenitic stainless steel
  12. Estimation of Fe2B growth on low-carbon steel based on two diffusion models
  13. Glass-forming ability and thermal stability of gas-atomized Zr50Cu40Al10 metallic glass powders
  14. Mechanochemical synthesis of nanocrystalline lead selenide: industrial approach
  15. On abnormal grain growth in nanocrystalline materials induced by small particles
  16. High-temperature deformation behaviour of Ti3Al-11Nb intermetallic
  17. Optimization of ZnO2 nanoparticle content in binary blended concrete to enhance high strength concrete
  18. New structural and mechanical features of hexagonal materials after room temperature extrusion using the KoBo method
  19. People
  20. Yuri Estrin turns 65
  21. DGM News
  22. DGM News
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