Rheo-Extrusion of A7075 Aluminium Alloy Utilizing Semi-Solid Slurry Manufactured by Simple Method

Ryotaro Nagata; Yasuhiro Uetani; Hidetoshi Takagi; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/MSF.519-521.1847

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HomeMaterials Science ForumMaterials Science Forum Vols. 519-521Rheo-Extrusion of A7075 Aluminium Alloy Utilizing...

Rheo-Extrusion of A7075 Aluminium Alloy Utilizing Semi-Solid Slurry Manufactured by Simple Method

Abstract:

In order to extrude A7075 aluminum alloy soundly from melt without using feed stock billet, rheo-extrusion was tried by utilizing semi-solid slurry with fine solid granules made by employing cooling tube. When the melt moving down inside thin tube was adequately cooled in different ways and introduced into an extrusion container kept at semi-solid temperature of 873K, structure of solidified slurries were granular and mean grain sizes of about 60 to 120μm could be obtained. Subsequently, these slurries were extruded to round bars at various extrusion ratios (28 to 64) and press ram speed of 10mm/s, just after cooling to 833K. The newly developed slurries could easily be extruded to bars with smooth surfaces at lower forces. Although every tensile strength of extruded bars were lower than that of hot-extruded one, there was a tendency that finer the solid granules in slurry, higher the tensile strength of extruded bar.

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Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

1847-1852

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.1847

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Online since:

July 2006

Authors:

Ryotaro Nagata, Yasuhiro Uetani, Hidetoshi Takagi, Kenji Matsuda, Susumu Ikeno

Keywords:

AA7075, Cooling Tube, Extrudability, Fine Solid Granule, Rheo-Extrusion, Semi-Solid Slurry, Tensile Properties

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References

[1] Y. Uetani, A. Hayakawa, H. Morimoto, K. Matsuda, F. Shinagawa and S. Ikeno, J. Japan Foundry Engineering Society, 70, pp.641-647, (1998).

Google Scholar

[2] T. Hihara, Y. Uetani, H. Takagi, K. Matsuda and S. Ikeno, Proc. of the fourth Pacific Rim Conf. On Advanced Materials and Processing (PRICM4), pp.2371-2374, (2001).

Google Scholar

[3] M. Dohi, Y. Uetani, H. Takagi, K. Matsuda and S. Ikeno, ibid., pp.2367-2370, (2001).

Google Scholar

[4] Y. Uetani, H. Sueda, H. Takagi, K. Matsuda and S. Ikeno, Materials Science Forum, 42-432, pp.507-512, (2003).

Google Scholar

[5] Y. Uetani, H. Takagi, K. Matsuda and S. Ikeno, J. Japan Institute of Light Metals, 50, pp.203-209, (2000).

Google Scholar