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|Title:||Cellular growth of Zn-rich Zn-Ag alloys processed by rapid solidification||Authors:||Xu, W.
|Issue Date:||25-May-2004||Citation:||Xu, W., Feng, Y.P., Li, Y., Li, Z.Y. (2004-05-25). Cellular growth of Zn-rich Zn-Ag alloys processed by rapid solidification. Materials Science and Engineering A 373 (1-2) : 139-145. ScholarBank@NUS Repository. https://doi.org/10.1016/j.msea.2004.01.022||Abstract:||Rapid solidification experiments were carried out on single-phase Zn-rich Zn-Ag alloys processed by laser remelting and melt-spinning techniques. For comparison, Bridgman solidification was performed as well. Three solidification morphologies were mainly identified with increasing growth velocity from 0.02 to 300 mm/s: regular cells or dendrites of η, plate-like cells of η, and plane front of η. Plate-like and regular cells were found to be velocity-dependent and occurred in high-velocity and low-velocity domains, respectively. The development of solidification interface morphologies in the present Zn-Ag alloys was proposed accordingly over a wide range of growth velocities from the limit of constitutional supercooling to the limit of absolute stability. Four microstructure transitions were identified: low-velocity plane front of η→low -velocity plate-like cells of η→regular cells or dendrites of η→high-velocity plate-like cells of η→high-velocity plane front of η. It implies that a plate-like cell would be the favorable morphology at growth conditions approaching a stable planar solid/liquid interface in comparison with the regular one. © 2004 Elsevier B.V. All rights reserved.||Source Title:||Materials Science and Engineering A||URI:||http://scholarbank.nus.edu.sg/handle/10635/95940||ISSN:||09215093||DOI:||10.1016/j.msea.2004.01.022|
|Appears in Collections:||Staff Publications|
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