TY - JOUR

T1 - Two-phase vicoplastic model for the simulation of twin roll casting

AU - Gomes Rodrigues, Christian

AU - Ludwig, Andreas

AU - Wu, Menghuai

AU - Kharicha, Abdellah

AU - Vakhrushev, Alexander

PY - 2020/12/1

Y1 - 2020/12/1

N2 - A two-phase Eulerian-Eulerian volume-averaged model was used to predict the outcome of the twin-roll casting process for inoculated Al-4 wt.% Cu alloys. The model is able to address the deformation of the mush during hot rolling by treating the solid/liquid mixture as a viscoplastic skeleton saturated with liquid. A parameter measuring the mean absolute deviation around the nominal composition was applied to the normalized macrosegregation distribution and the results were then used to determine an optimal process window where minimal compositional variation is achieved in the final strip. In the case of casting an 8 mm thick Al-4%Cu strip with rolls of 800 mm diameter, casting speeds between 40 and 42 mm/s and heat transfer rates given by HTCs between 5000 and 5250 W/m2/K minimize the macrosegregation deviations in the strip and thus predict an optimal strip quality.

AB - A two-phase Eulerian-Eulerian volume-averaged model was used to predict the outcome of the twin-roll casting process for inoculated Al-4 wt.% Cu alloys. The model is able to address the deformation of the mush during hot rolling by treating the solid/liquid mixture as a viscoplastic skeleton saturated with liquid. A parameter measuring the mean absolute deviation around the nominal composition was applied to the normalized macrosegregation distribution and the results were then used to determine an optimal process window where minimal compositional variation is achieved in the final strip. In the case of casting an 8 mm thick Al-4%Cu strip with rolls of 800 mm diameter, casting speeds between 40 and 42 mm/s and heat transfer rates given by HTCs between 5000 and 5250 W/m2/K minimize the macrosegregation deviations in the strip and thus predict an optimal strip quality.

KW - Alloy solidification

KW - Computational modelling

KW - Macrosegregation

KW - Twin-roll casting

KW - Two-phase flow

KW - Viscoplasticity

UR - http://www.scopus.com/inward/record.url?scp=85087407969&partnerID=8YFLogxK

U2 - 10.1016/j.jmatprotec.2020.116814

DO - 10.1016/j.jmatprotec.2020.116814

M3 - Article

AN - SCOPUS:85087407969

VL - 286.2020

JO - Journal of materials processing technology

JF - Journal of materials processing technology

SN - 0924-0136

IS - December

M1 - 116814

ER -