. Influence Of The Solıdıfıcatıon Parameters On Dendrıtıc Mıcrostructures In Unsteady-State Dırectıonally Solıdıfıed Of Lead–Antımony Alloy,

ŞAHİN M., ÇADIRLI E., KAYA H.

SURFACE REVIEW AND LETTERS, vol.17, pp.477-486, 2011 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 17
  • Publication Date: 2011
  • Journal Name: SURFACE REVIEW AND LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.477-486
  • Erciyes University Affiliated: Yes

Abstract

Pb-9.3wt.%Sb alloy was directionally solidified upwards under argon atmosphere under the two conditions; with different temperature gradients, (G = 0.93–3.67K/mm) at a constant growth rate (V = 17.50 µm/s) and with different growth rates (V = 8.30–497.00 µm/s) at a constant (G = 3.67 K/mm) in a Bridgman furnace. The dependence of characteristic microstructure parameters such as primary dendrite arm spacing (?1), secondary dendrite arm spacing (?2) and dendrite tip radius (R) on the growth rate (V) and the temperature gradient (G) were determined by using a linear regression analysis. A detailed analysis of microstructure were alsomade and compared with the theoretical models and similar experimental works on dendritic solidification in the literature.