Effect of Preheating Temperature of Multiplex-Type Slurry Cup on the Morphology of Primary Solid Phase of Semi-Solid Slurry

Abstract:

Semi-solid slurry for a rheocasting process requires a fine and globular structure of primary solid phase. In the present study, in order to find an optimum preheating temperature of a multiplex-type slurry cup in the slurry maker that we recently developed for the rheocasting process, the semi-solid slurry was held for a various time of up to 60 min. in a multiplex-type slurry cup preheated at a different temperature. A size and morphology of primary solid phase of the semisolid slurry was measured and analyzed with the difference of the recorded cooling curve during the solidification with respect to a preheating temperature of the slurry cup. Also, a microstructural evolution and globularization mechanism occurred during the isothermal holding were discussed. Finally, as considering the effect of a different casting condition on the morphology of primary solid phase the optimum manufacturing condition of the semi-solid slurry for the rheocasting process was proposed.

• Periodical: Solid State Phenomena (Volumes 116-117)
• Pages: 332-335
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.116-117.332
• Online since: October 2006
• Authors: Suk Won Kang, Dock Young Lee, Ki Bae Kim
• Keywords: A Preheating Temperature of Slurry Cup, Globularization, Isothermal Holding, Primary Solid Phase, Semi-Solid Slurry

References

[1] M. C. Flemings: Metall. Trans. Vol. 22A (1991), p.957.

[2] C. P. Chen and C. Y. A. Tsao: J. Mater. Sci. Vol. 30 (1995), p.4019.

[3] K.P. Young and R. Fitze: Proc. of the 3th Int. Conf. on Semi-Solid Processing of Alloys and Composites, Tokyo, Japan, 13-15 June (1994), p.155.

[4] S.W. Kang, K.B. Kim, D.Y. Lee, J.H. Mun and E.P. Yoon: Materials Science Forum Vol. 510511(2006), p.394, ibid: 782.