Publication detail

A Coupled Magnetohydrodynamics (MHD) and Thermal Stress-Strain Model to Explore the Impact of Gas Cooling on Ingot Solidification Shrinkage in Vacuum Arc Remelting (VAR) Process

BOHÁČEK, J. KARIMI-SIBAKI, E. VAKHRUSHEV, A. MRÁZ, K. HVOŽĎA, J. WU, M. KHARICHA, A.

Original Title

A Coupled Magnetohydrodynamics (MHD) and Thermal Stress-Strain Model to Explore the Impact of Gas Cooling on Ingot Solidification Shrinkage in Vacuum Arc Remelting (VAR) Process

Type

journal article in Web of Science

Language

English

Original Abstract

An advanced 2D axisymmetric magnetohydrodynamics model, including calculations for electromagnetic, thermal, and flow fields, fully coupled with a thermal stress-strain model, allowing the computation of solid mechanical parameters like stress, strain, and deformation within the ingot of the vacuum arc remelting process is presented. This process encounters challenges due to solidification shrinkage, which causes losing contact between the ingot and the mold, reducing the cooling efficiency of the system, resulting in a deeper melt pool and decreasing ingot quality. Herein, the width of the air gap along the ingot, the precise position of contact between the ingot and mold, and the profile of the melt pool, affected by gas cooling, are calculated. The global pattern of transport phenomena, such as (electro-vortex) flow and electromagnetic fields in the bulk of the ingot, is insensitive to helium gas cooling through the shrinkage gap. However, including gas cooling significantly improves heat removal through the mold, which consequently reduces the pool depth of the Alloy 718 ingot, leading to an improvement in the quality of the ingot.

Keywords

vacuum arc remelting; magnetohydrodynamics; Lorentz force; thermal stress-strain; coupling; gas cooling; shrinkage; gap

Authors

BOHÁČEK, J.; KARIMI-SIBAKI, E.; VAKHRUSHEV, A.; MRÁZ, K.; HVOŽĎA, J.; WU, M.; KHARICHA, A.

Released

4. 9. 2024

ISBN

1073-5615

Periodical

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE

Year of study

55

Number

6

State

United States of America

Pages from

4408

Pages to

4417

Pages count

10

URL

https://link.springer.com/article/10.1007/s11663-024-03254-4

BibTex

@article{BUT189481,
  author="Jan {Boháček} and Ebrahim {Karimi-Sibaki} and Alexander {Vakhrushev} and Kryštof {Mráz} and Jiří {Hvožďa} and Menghuai {Wu} and Abdellah {Kharicha}",
  title="A Coupled Magnetohydrodynamics (MHD) and Thermal Stress-Strain Model to Explore
the Impact of Gas Cooling on Ingot Solidification
Shrinkage in Vacuum Arc Remelting (VAR) Process
",
  journal="METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE",
  year="2024",
  volume="55",
  number="6",
  pages="10",
  doi="10.1007/s11663-024-03254-4",
  issn="1073-5615",
  url="https://link.springer.com/article/10.1007/s11663-024-03254-4"
}