TY - CONF

T1 - A numerical study on the solidification shrinkage of the ingot in vacuum arc remelting (VAR) process

AU - Mraz, Krystof

AU - Bohacek, Jan

AU - Karimi Sibaki, Ebrahim

AU - Vakhrushev, Alexander

AU - Wu, Menghuai

AU - Kharicha, Abdellah

PY - 2024/9

Y1 - 2024/9

N2 - Vacuum Arc Remelting (VAR) process is employed in the production of Nickel-basedalloys, including Alloy 718. However, challenges arise during the process due to solidificationshrinkage, leading to the loss of contact between the ingot and the mold. This phenomenondiminishes the cooling efficiency of the system, resulting in a deeper melt pool and a decline iningot quality as heat removal becomes less effective. To comprehensively investigate theimplications of solidification shrinkage, we introduce a sophisticated 2D axisymmetricMagnetohydrodynamics (MHD) model. This model incorporates calculations for electromagnetic,thermal, and flow fields. Also, the MHD model is fully coupled with a thermal stress-strain model,enabling the computation of solid mechanical parameters like stress, strain, and deformationwithin the ingot. Our coupled model provides essential insights, including the width of the air gapalong the ingot, the precise position of contact between the ingot and mold, and the profile of themelt pool, among other critical parameters.

AB - Vacuum Arc Remelting (VAR) process is employed in the production of Nickel-basedalloys, including Alloy 718. However, challenges arise during the process due to solidificationshrinkage, leading to the loss of contact between the ingot and the mold. This phenomenondiminishes the cooling efficiency of the system, resulting in a deeper melt pool and a decline iningot quality as heat removal becomes less effective. To comprehensively investigate theimplications of solidification shrinkage, we introduce a sophisticated 2D axisymmetricMagnetohydrodynamics (MHD) model. This model incorporates calculations for electromagnetic,thermal, and flow fields. Also, the MHD model is fully coupled with a thermal stress-strain model,enabling the computation of solid mechanical parameters like stress, strain, and deformationwithin the ingot. Our coupled model provides essential insights, including the width of the air gapalong the ingot, the precise position of contact between the ingot and mold, and the profile of themelt pool, among other critical parameters.

M3 - Paper

T2 - The Liquid Metal Processing and Casting Conference (LMPC 2024)

Y2 - 22 September 2024 through 25 September 2024

ER -