Paper Title:
Microstructure Evolution in a Directional Solidification Process
  Abstract

Models and theories of the microstructure evolution in a directional solidification (DS) process will be firstly addressed. Discrepancies between theories and experiments will be presented. For the thin film sample growth in a temperature gradient stage, the geometrical constraint makes it difficult to compare the experimental primary spacing with theoretical predictions. While for a bulk sample growth, fluid flow always exists in the solidification process despite that the growth interface rejects a lighter or heavier solute. Based on these analyses, the appropriate techniques to conduct DS experiments are proposed that can be used to test models. One is the solidification in a capillary sample where a single cell/dendrite grows. While for array growth in 3 dimensions, long-duration microgravity experiments will be the only viable way to obtain meaningful results.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
2757-2760
DOI
10.4028/www.scientific.net/MSF.475-479.2757
Citation
S. Liu, R. Trivedi, "Microstructure Evolution in a Directional Solidification Process", Materials Science Forum, Vols. 475-479, pp. 2757-2760, 2005
Online since
January 2005
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Lorenz Ratke, Sonja Steinbach, Georg Müller, Marc Hainke, András Roósz, Yves Fautrelle, M.D. Dupouy, Gerhard Zimmermann, A. Weiß, Hermann-Josef Diepers, Jacques Lacaze, R. Valdes, G.U. Grün, H.-P. Nicolai, H. Gerke-Cantow
Abstract:The MICAST research program focuses on a systematic analysis of the effect of convection on the microstructure evolution in cast Al-alloys....
131
Authors: Bin Li, Qing Yan Xu, Bai Cheng Liu
Abstract:A modified Cellular Automaton model was presented to simulate the evolution of dendritic microstructure in low pressure die casting of Al-Si...
1787
Authors: H. Wang, Q. Li
Abstract:A model based on the cellular automaton (CA) technique for the simulation of solidification microstructure has been developed. An improved...
271
Authors: Pei Zhang, Feng Shan Du, Zhi Qiang Xu, Ling Ling Zhao
Abstract:A stochastic mathematic model contained the effects of dendrite morphology, solidification shrinkage and dissolved gases was formed to...
115
Authors: Hsiun Chang Peng, Long Sun Chao
Abstract:Rather than designated directly as solid if the micromesh (or cell) larger than a nucleus is chosen as the nucleation site, the growth of a...
22