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Development of In-Ladle Direct Thermal Control (DTC) Rheocasting Process

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Abstract:

In recent year, various rheocasting methods, other than stirring in the semisolid state, have been developed to produce a fine globular primary phase in cast alloys. These new methods, called as slurry-on-demand, involve the controlled nucleation and growth/ripening of primary phase during partial solidification. In-Ladle direct thermal control (DTC) rheocasting has been competitively and successfully developed. It requires no processing equipment outside of the casting machine, no grain refinement procedure and no additional cycling time except for cooling down to the desired casting temperature. Process concept of In-Ladle DTC rheocasting is simply based on the fact that there is slurry and mush transition in the range of liquid fraction of 0.1 to 0.6 and the fact that the transition could be controlled by controlling the shape of solid and the relative energy. This study is mainly concerned about the feasibility to achieve semisolid slurry during partial solidification only through thermal and time control, this is, by In-Ladle DTC rheocasting. Based on the optimum conditions obtained by thermal modeling, microstructural evolution of Al alloys was carried out by In-Ladle DTC rheocasting. The fluidity was also investigated by In-Ladle DTC rheocasting for Al alloys.

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Periodical:

Solid State Phenomena (Volumes 116-117)

Pages:

518-521

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.116-117.518

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Online since:

October 2006

Authors:

Jin Kyu Lee, Young Ok Yoon, Hyung Ho Jo, Young Jig Kim, Shae K. Kim

Keywords:

A206, A356 Aluminum Alloy, In-Ladle DTC Rheocasting, Thermal Control

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] Z. Brown et al.: Semi-Solid Metal Casting Practices: Past, Present and Future, presented at the 2004 SAE World Congress, Detroit, Michigan, March 8-11 (2004).

Google Scholar

[2] Lukasson et al.: Alloy Characterization for the New Ube Rheocasting Process, presented at the AFS Congress, Kansas City, paper #02-032.

Google Scholar

[3] M. Adachi and S. Satoru: Characterizations of the New Rheocasting Process, Trans. 20 th International DieCasting Congress and Exposition (1999), pp.47-52.

Google Scholar

[4] Ube Industries Ltd., Japan: European patent # Ep0 745 694 A1, Dec. 4 (1996).

Google Scholar

[5] R. Shibata, T. Kaneuchi, T. Souda and H. Yamane: Proceeding of the 5 th International Conference on Semi-Solid Processing of Alloys and Composites, Golden, Colorado (1998), p.469.

Google Scholar

[6] G.C. Gullo, K. Steihoff and P.J. Uggowitzer: Proc. 6th International Conference on Semi-Solid Processing of Alloys and Composites, G.L. Chiarmetta and M. Rosso, des., Edimet Spa, Brescia (2000), pp.367-372.

Google Scholar

[7] G. Chichignoud: Etude de la distribution des films eutectiques en fin de solidification deun alliage d'aluminium, applications a la formation de criques a chaud, M. Sc. Work, INP Grenoble (2003).

Google Scholar

[8] D. Brabazon, D.J. Browne and A.J. Carr.: Mater. Sci. Eng. Vol. A356 (2003), p.69.

Google Scholar

[9] D. Lennart Backerud et al.: Solidification Characteristics of Aluminum Alloys Vol. 2 (1990) p.64.

Google Scholar