Green and Sintered Properties of Consolidated Mixtures of Mechanically Alloyed and Elemental Al Powders

Abstract:

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Mechanically alloyed aluminium, MA Al, powder is difficult to consolidate. Consolidation often involves complex processing that includes a hot extrusion stage. An alternative consolidation method consisting of a press-and-sinter process has been developed at the University of Seville. Nevertheless, sintered MA Al compacts have a low ductility. In the present work, to improve the ductility of consolidated compacts, hard MA Al powder was blended prior to the consolidation processing with different amounts (10, 20, 30 wt%) of soft unmilled Al powder. The bimodal microstructure (hard/soft) of the final compacts makes it possible to balance strength and ductility values.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

774-778

DOI:

10.4028/www.scientific.net/MSF.514-516.774

Citation:

J. A. Rodríguez et al., "Green and Sintered Properties of Consolidated Mixtures of Mechanically Alloyed and Elemental Al Powders ", Materials Science Forum, Vols. 514-516, pp. 774-778, 2006

Online since:

May 2006

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$35.00

[1] F.V. Beaumont: Int. J. Powder Metall., Vol. 36-6 (2000), p.41.

[2] J.H. Dudas and C.B. Thompson: Modern Developments in Powder Metallurgy (Ed. by H.H. Hausner, Vol. 5, Plenum Press, New York, NY, USA 1971).

[3] M.J. Bomford and J.S. Benjamin: US Patent 3, 816, 080, June 11, (1974).

[4] J. A. Rodríguez, J. M. Gallardo and E. J. Herrera: J. Mat. Sci. Vol. 32 (1997), p.3535.

[5] R.F. Singer, W.C. Oliver and W.D. Nix: Metall. Trans. A Vol. 11 (1980), p.1895.

[6] J.L. Herrero, J.A. Rodríguez and E.J. Herrera: 1998 Powder Metallurgy World Congress, Vol 1 (EPMA, Shrewsbury, UK, 1998).

[7] J. H. Weber and R. D. Schelleng: Dispersion Strengthened Aluminum Alloys (Ed. by Y. -W. Kim and W. M. Griffith, The Minerals, Metals & Materials Society, Warrendale, PA, USA 1988).

[8] J.A. Rodríguez, J.M. Gallardo and E.J. Herrera: Mater. Trans., JIM Vol. 36 (2) (1995), p.312.

[9] MPIF Standard 15: Determination of Green Strength of Compacted Metal Powder Specimens (Metal Powder Industries Federation 1990).

[10] MPIF Standard 10: Tension Test Specimen for Pressed and Sintered Metal Powders (Metal Powder Industries Federation 1963).

[11] ASTM Standard Method A370: Mechanical Testing of Steel Products (American Society for Testing and Materials 1977).

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