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Coupling The Nano and Micro Scales In Modelling The Formation of Metallic Microstructures

Published online by Cambridge University Press:  15 February 2011

A. Chirazi  and
H. Rafii-Tabar
A. Chirazi
Affiliation:
Computational Nano-Science Research Group, School of Computing and Mathematical Sciences, University of Greenwich, 30 Park Row, London SE10 9LS, UK
H. Rafii-Tabar
Affiliation:
Computational Nano-Science Research Group, School of Computing and Mathematical Sciences, University of Greenwich, 30 Park Row, London SE10 9LS, UK
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Abstract

We have developed a model of dendritic grain growth in the solidification process of metallic alloys in which the output of a nanoscopic molecular dynamics simulation, based on the use of many-body interatomic potentials, provides the input into the microscopic nucleation and growth model of Rappaz et al. The microscopic model itself is also extended by the introduction of a stochastic dynamics, via the Ito stochastic calculus, to account for the random fluctuations in the growth trajectory of the dendrite tip. The model is applied to the industrially important Sn-Pb alloy and its result is compared with that obtained with the Rappaz model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 265
Copyright
Copyright © Materials Research Society 2000

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