Skip to Main content Skip to Navigation
Journal articles

Role of transverse temperature gradients in the generation of lamellar eutectic solidification patterns

Abstract : In directional solidification, a sample is pulled in an externally imposed temperature gradient. When the pulling direction and the temperature gradient are not perfectly aligned, a transverse temperature gradient is generated in the sample. We investigate the dynamics of lamellar eutectic patterns, both by experimental observations and by numerical simulations, and find that it is dramatically affected by a transverse gradient. Whereas, in its absence, the labyrinth patterns that are formed in the initial stage of solidification persist over the entire duration of the experiments, a transverse temperature gradient induces a drift of the pattern which rapidly generates a regular array of lamellae. The drift speed is found to be consistently larger than expected from the normal growth hypothesis, both ill Simulations and experiments. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01239033
Contributor : Gestionnaire Hal-Upmc Connect in order to contact the contributor
Submitted on : Monday, December 7, 2015 - 1:05:08 PM
Last modification on : Monday, March 8, 2021 - 1:34:07 PM

Identifiers

`

Citation

Mikael Perrut, Andrea Parisi, Silvère Akamatsu, Sabine Bottin-Rousseau, Gabriel Faivre, et al.. Role of transverse temperature gradients in the generation of lamellar eutectic solidification patterns. Acta Materialia, Elsevier, 2010, 58 (5), pp.1761-1769. ⟨10.1016/j.actamat.2009.11.018⟩. ⟨hal-01239033⟩

Share

Metrics

Record views

268