Effects of growth rate and temperature gradient on the microstructure parameters in the directionally solidified succinonitrile-7.5 wt.% carbon tetrabromide alloy


Maraşlı N., Keşlioǧlu K., Arslan B., Kaya H., Çadirli E.

Journal of Materials Processing Technology, vol.202, no.1-3, pp.145-155, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 202 Issue: 1-3
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jmatprotec.2007.09.011
  • Journal Name: Journal of Materials Processing Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.145-155
  • Keywords: organic compounds, crystal growth, solidification, microstructures, phase transitions
  • Istanbul Gelisim University Affiliated: No

Abstract

Succinonitrile (SCN)-7.5 wt.% carbon tetrabromide (CTB) alloy was unidirectionally solidified with a constant growth rate (V = 33 μm/s) at five different temperature gradients (G = 4.1-7.6 K/mm) and with a constant temperature gradient (G = 7.6 K/mm) at five different growth rates (V = 7.2-116.7 μm/s). The primary dendrite arm spacings, secondary dendrite arm spacings, dendrite tip radius and mushy zone depths were measured. Theoretical models for the microstructure parameters have been compared with the experimental observations, and a comparison of our results with the current theoretical models and previous experimental results have also been made. © 2007 Elsevier B.V. All rights reserved.