Abstract
Directional solidification of aluminium-silicon eutectic alloys were carried out in order to investigate the mechanism by which the quench modification takes place. For this purpose a new type of Bridgman furnace was designed which can attain a high temperature gradient and a high interfacial growth velocity up to 1000 μm−1. It is established that the fibrous structure is the result of faceted-non-faceted growth of the coarse silicon particle at high solidification rate. It is observed that refining of the flake structure closely follows the characteristics of normal eutectic.
Similar content being viewed by others
References
J. CHERBONNIER, J. J. PERRIER and R. PORTALIER, Int. Cast Metals J. AFS 3 (4) (1976) 17.
P. B. CROSSLEY and L. F. MONDOLFO, Mod. Cast. 49 (1966) 53.
H. A. H. STEEN and A. HELLAWELL, Acta Metall 20 (1972) 363.
D. C. JENKINSON and L. M. HOGAN, J. Crystal Growth, 72 (1975) 735.
M. G. DAY and A. HELLAWELL, Acta Metall. 20 (1972) 363.
J. W. RUTTER, J. Crystal Growth 42 (1977) 515.
SHU-ZU-LU and A. HELLAWELL, ibid. 73 (1985) 316.
M. SHAMSUZZOHA and L. M. HOGAN, ibid. 76 (1986) 496.
Idem, Philos. Mag. 54 (1986) 549.
Idem, J. Crystal Growth 82 (1987) 598.
K. A. JACKSON, in “Proceedings of the International Conference on Crystal Growth” (North-Holland, Amsterdam, (1974) p. 173.
M. SHASUZZOHA and L. M. HOGAN, in “Solidification Processing” (Institute of Metals, London, 1988) p. 40.
S. KHAN, A. OURDIJINI and R. ELLIOTT, Mater. Sci. Technol. 8 (1978) 516.
S. KHAN, Ph.D thesis, University of Manchester (1990).
S. KHAN and R. ELLIOTT, Acta Metall. Mater. 41 (1993) 2433.
SHU-ZU-LU and A. HELLAWELL, Metall. Trans. 18A (1987) 1721.
F. J. MAJOR and J. W. RUTTER, Mater. Sci. Technol. 5 (1989) 645.
O. A. ATASOY, Z. Metallkde 78 (1987) 177.
A. N. A. ABDI, Ph.D thesis, University of Manchester (1992).
J. LUI, Y. ZHOU and B. SHANG, Acta Metall. Mater. 38 (1990) 1625.
Idem, ibid. 38 (1990) 1631.
R. GRUGEL and W. KURZ, Metall. Trans. 18A (1987) 1137.
L. M. HOGAN and H. SONG, ibid. 18 (1987) 707.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Khan, S., Elliott, R. Quench modification of aluminium-silicon eutectic alloys. JOURNAL OF MATERIALS SCIENCE 31, 3731–3737 (1996). https://doi.org/10.1007/BF00352787
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00352787