Eutectic Solidification of Ternary Al-Cu-Ag Alloys: Coupled Growth of α(Al) and Al2Cu in Univariant Reaction

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Coupled, regular eutectic growth of α(Al) and Al2Cu from ternary Al-Cu-Ag liquid alloys is investigated with focus on the formation and the characteristics of eutectic cells in unidirectionally solidified, polycrystalline, bulk samples. The topologic anisotropy of the lamellar eutectic leads to destabilization along the lamellae with elongated cells being intermediate to stable cells, irrespective of the crystallographic orientation of the phases. The formation of stable cellular patterns with elongated or regular cell structure is explained with reference to the crystal orientation of the phases α(Al) and Al2Cu, measured by electron backscatter diffraction (EBSD).

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Periodical:

Edited by:

A Roósz, M. Rettenmayr and Z. Gácsi

Pages:

57-62

DOI:

10.4028/www.scientific.net/MSF.508.57

Citation:

U. Hecht et al., "Eutectic Solidification of Ternary Al-Cu-Ag Alloys: Coupled Growth of α(Al) and Al2Cu in Univariant Reaction", Materials Science Forum, Vol. 508, pp. 57-62, 2006

Online since:

March 2006

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$35.00

[1] M. Plapp and A. Karma: Phys. Rev. E 60, (1999), p.6865.

[2] S. Akamatsu and G. Faivre:, Phys. Rev. E 61, (2000), p.3757.

[3] W. H. S. Lawson and H.W. Kerr: J. Cryst. Growth 12, (1972), p.209.

[4] U. Hecht, V.T. Witusiewicz, A. Dervermann and S. Rex: Adv. Eng. Mat., (2004) submitted.

[5] A. Sayir and S.C. Framer: Acta Mater. 48, (2000) p.4691.

[6] A. Larrea, L. Contreras, R.I. Merino, J. Llorca, and V. M. Orera, J. Mater. Res. 15 (2000), p.1314.

[7] V.T. Witusiewicz, U. Hecht and S. Rex, J. Alloys Comp. (2004), in press.

[8] M.D. Rinaldi, R.M. Sharp and M.C. Flemings: Metall. Trans. 3 (1972) p.3139.

[9] C. L. Rohrer: Modelling Simul. Mater. Sci. Eng. 2, (1994) p.119.

[10] Pearson's Handbook of Crystallographic Data for Intermetallic Phases, Ed. P. Villars and L.D. Calvert, American Society for Metals, 1985, Vol. 2.

[11] R. Bonnet and F. Durand, in Conference on in situ composites, Public NMAB 308-I, Lakerville, USA (1973), pp.209-223.

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