The mechanism of grain refinement during solidification of Zn-Ti base alloys |
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| Authors: | G. L. Leone P. Niessen H. W. Kerr |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada
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| Abstract: | ![]()
Through cooling curve determinations, metallography, and electron microprobe analysis the mechanism of grain refinement in Zn-Ti and Zn-Ti-Cu alloys was determined. It is shown that zinc-titanium-oxide particles in the melt act as nucleants. Through probe analysis and considerations of matching of crystallographic planes it appears that the nuclei are the spinel Zn2TiO4. Additions of lead to Zn-Ti melts drastically reduces the effectiveness of the nucleant. |
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