Microstructures and Mechanical Properties of Mg Alloy after Severe Torsion Straining Process

Yuichi Miyahara; N. Emi; Koji Neishi; Katsuaki Nakamura; Kenji Kaneko; Michihiko Nakagaki; Z. Horita

doi:10.4028/www.scientific.net/MSF.503-504.949

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HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Microstructures and Mechanical Properties of Mg...

Microstructures and Mechanical Properties of Mg Alloy after Severe Torsion Straining Process

Abstract:

Grain refinement is attempted using severe plastic deformation (SPD) through the severe torsion straining process (STSP) which we have developed recently. The STSP is a continuous process for grain refinement without requirement of any die. In this study, an AZ61 Mg alloy was subjected to STSP at a temperature of 573 K with a rotation speed of 10 rpm and a moving speed of 200 mm/min. With this process, an initial grain size of ~20 μm was reduced to ~2~3 μm. Room temperature compression tests revealed that there were no cracks after 15% of compression for the STSP sample whereas fracture occurred for a conventionally extruded sample. For compression tests at 473 K, no cracks occurred in the STSP samples after 80% compression but compression was feasible without cracking only up to 20% for an extruded sample. It is shown that the STSP can be useful for grain refinement and ductility improvement of the AZ61 Mg alloy.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

949-954

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.949

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Online since:

January 2006

Authors:

Yuichi Miyahara, N. Emi, Koji Neishi, Katsuaki Nakamura, Kenji Kaneko, Michihiko Nakagaki, Z. Horita

Keywords:

AZ61, Compression Test, Grain Refinement, Severe Plastic Deformation (SPD), STSP

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References

[1] A. Yamashita, Z. Horita and T.G. Langdon: Mater. Sci. Eng. Vol. A300 (2001).

Google Scholar

[2] M. Mabuchi, H. Iwasaki, K. Yanase and K, Higashi: Scripta Mater. Vol. 36 (1996), p.681.

Google Scholar

[3] H. Watanabe, T. Mukai, K. Ishikawa and K. Higashi: Scripta Mater. Vol. 46 (2002), p.851.

Google Scholar

[4] Y. Miyahara, K. Matsubara, K. Neishi, Z. Horita and T.G. Langdon: Mater. Sci. Forum Vol. 419-422 (2003), p.551.

Google Scholar

[5] V.M. Segal, V.I. Reznikov, A.E. Drobyshevsky and V.I. Kopylov: Russian Metall. Vol. 1 (1981), p.99.

Google Scholar

[6] R.Z. Valiev, N.A. Kraslnikov and N.K. Tsenev: Mater. Sci. Eng. Vol. A137 (1991), p.35.

Google Scholar

[7] N.A. Smirnova, V.I. Levit, V.I. Pilyugin, R.I. Kuznetsov, L.S. Davydova and V.A. Sazonova: Fiz Metal Metalloved Vol. 61 (1986), p.1170.

Google Scholar

[8] Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai: Acta Mater. Vol. 47 (1999), p.579.

Google Scholar

[9] K. Nakamura, K. Neishi, K. Kaneko, M. Nakagaki and Z. Horita: Mater. Trans. Vol. 45 (2004), p.3338.

Google Scholar