Abstract

During casting, diffusion phenomena are often simplified by Lever-Rule or GulliverScheil hypotheses, thus simplifying chemical diffusion to extreme configurations. The present work proposes an extension of the Tong-Beckermann microsegregation model to multi-component alloys while considering finite diffusion in liquid and solid phases plus the effect of tip undercooling of the columnar front. The behaviour of this model is studied according the solidification conditions (growth velocity and thermal gradient) and comparison with microprobe measurements is proposed for a seven components nickel-base superalloy.

Details

Title
Finite diffusion microsegregation model applied to multicomponent alloys
Author
Maguin, V 1 ; Guillemot, G 2 ; Jaquet, V 3 ; Niane, N T 3 ; Rougier, L 3 ; Daloz, D 4 ; Zollinger, J 4 ; Ch-A Gandin 2 

 MINES ParisTech, PSL Research University, CEMEF − Centre de mise en forme des matériaux, CNRS UMR 7635, CS 10207, 1 rue Clause Daunesse, F-06904 Sophia Antipolis Cedex, France; Safran, site de Paris-Gennevilliers, 171 Boulevard de Valmy, F-92700 Colombes, France 
 MINES ParisTech, PSL Research University, CEMEF − Centre de mise en forme des matériaux, CNRS UMR 7635, CS 10207, 1 rue Clause Daunesse, F-06904 Sophia Antipolis Cedex, France 
 Safran, site de Paris-Gennevilliers, 171 Boulevard de Valmy, F-92700 Colombes, France 
 Université de Lorraine, Institut Jean Lamour, CNRS UMR 7195, F-54011 Nancy, France 
Publication year
2019
Publication date
May 2019
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2561046571
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.