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Modelling of Secondary Dendrite Arms Evolution during Solidification by a Phase-field Method

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conference contribution
posted on 23.01.2017, 13:54 by Q-W. Zheng, T. Jing, Hong-biao Dong
Mechanical property of cast metals is strongly dependent on solidification structure, in particular the secondary dendrite arms spacing. In this study a Phase Field Method was used to simulate the evolution of dendritic structure with coupled heat and solute diffusion during solidification. Coarsening and remelting of the secondary arms were simulated. It is found that (1) the base of the secondary arms doesn't decrease as coarsening theory predicts and the arms spacing keeps unchanged when the arm grows into a steady state, but the volume of the arms increases; (2) both remelting of secondary arms and coarsening of secondary arms can be observed, which agrees with the coarsening theory and experiment observations.

Funding

This research is funded by National Natural Science Foundation of China (No. 51175292 and No. 513101062).

History

Citation

Materials Today: Proceedings, 2015, 2, pp. S466-S473

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Source

Joint 3rd UK-China Steel Research Forum & 15th CMA-UK Conference on Materials Science and Engineering

Version

VoR (Version of Record)

Published in

Materials Today: Proceedings

Publisher

Elsevier

eissn

2214-7853

Copyright date

2015

Available date

23/01/2017

Publisher version

http://www.sciencedirect.com/science/article/pii/S2214785315001340?via=ihub

Language

en