Finite diffusion microsegregation model applied to multicomponent alloys

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Maguin, V.^1^2 ; Guillemot, G.^1 ; Jaquet, V.^2 ; Niane, N.T.^2 ; Rougier, L.^2 ; Daloz, D.^3 ; Zollinger, J.^3 ; Gandin, Ch.-A.^1

MINES ParisTech, PSL Research University, CEMEF - Centre de Mise en Forme des Matériaux, CNRS UMR 7635, CS 10207, 1 rue Clause Daunesse, Sophia Antipolis Cedex

F-06904, France^1

Safran, Site de Paris-Gennevilliers, 171 Boulevard de Valmy, Colombes

F-92700, France^2

Université de Lorraine, Institut Jean Lamour, CNRS UMR 7195, Nancy

F-54011, France^3

关键词: Chemical diffusion;    Diffusion phenomena;    Growth velocity;    Micro-segregation;    Microprobe measurements;    Multi-component alloy;    Nickel base superalloy;    Solidification condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012029/pdf
DOI  :  10.1088/1757-899X/529/1/012029

来源: IOP

【 摘 要 】

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.