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

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

1847-1852

DOI:

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

Citation:

R. Nagata et al., "Rheo-Extrusion of A7075 Aluminium Alloy Utilizing Semi-Solid Slurry Manufactured by Simple Method", Materials Science Forum, Vols. 519-521, pp. 1847-1852, 2006

Online since:

July 2006

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$35.00

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

[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).

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

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

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

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