VAR ingot solidification model and its verification

Kondrashov, E. N.; Rusakov, Kirill; Ледер, М. О.

doi:10.1140/epjst/e2019-900115-5

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…As shown in Figure 1, the basic feature of VAR is that the consumable electrode is continuously melted under vacuum conditions, and simultaneously, the ingot is continuously solidified and increased in the mold from the bottom to the top [6,7]. In addition to composition segregation, the ingot produced by vacuum arc remelting also has some defects, such as an uneven solidification structure and shrinkage holes, which are the main factors determining the quality of the ingot [8][9][10][11]. Therefore, in order to obtain ingots with good quality, it is of great significance to study the formation of the solidification structure of ingots by vacuum arc remelting.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Solidification Structure in the Vacuum Arc Remelting Process of Titanium Alloy TC4 Based on 3D CAFE Method

Jing,

Liu,

Geng

et al. 2024

Processes

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Vacuum arc remelting is the main production method of titanium alloy ingots at present. In order to obtain good quality ingots, it is of great significance to study the formation of the solidification structure of ingots via vacuum arc remelting. In order to select and optimize the nucleation parameters for the solidification microstructure simulation of an ingot, a 3D CAFE model for microstructure evolution during vacuum arc remelting was established, taking into account heat transfer, flow, and solute diffusion. The Gaussian distribution continuous nucleation model and extended KGT model were used to describe the grain nucleation and dendrite tip growth rates, respectively. The multi-point mass source and moving boundary method were used to simulate the ingot growth. The results show that there are three typical crystal regions in the solidification structure of vacuum arc remelting titanium alloy ingots, namely the surface fine crystal region, columnar crystal region, and central equiaxed crystal region. The proportion of the columnar crystal region in the solidification structure of an ingot increases gradually with the increase in the undercooling of the maximum bulk nucleation. With an increase in the maximum bulk nucleation density, the equiaxed grain zone gradually increases, and the grain size gradually decreases. The proportion of the columnar crystal region in the solidification structure of an ingot increases gradually with an increase in the undercooling of the maximum bulk nucleation. The maximum volume nucleation variance has no obvious effect on the change in the solidification structure. When the maximum volume nucleation undercooling is 5.5 K, the maximum volume nucleation standard deviation is 4 K, and the maximum volume nucleation density is 5 × 108. The solidification structure simulation results are in good agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Simulation of Solidification Structure in the Vacuum Arc Remelting Process of Titanium Alloy TC4 Based on 3D CAFE Method

Jing,

Liu,

Geng

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…All manuscripts are grouped into seven sections, namely, 1. Multi-phase and multi-component systems [18][19][20][21] [49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of heat/mass transport, nucleation and growth kinetics in phase transformations

Alexandrov

Galenko

Starodumov

2020

Eur. Phys. J. Spec. Top.

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The present theme issue is devoted to recent trends and research directions in the phase transformation phenomena occurring in metastable and heterogeneous materials. All papers are concerned with modern theories, experiments, and computer simulations in the wide area of phase transformations. Particular attention is paid to traditional research domains representing the theoretical background for recent simulations and experiments that are as well specifically highlighted herein. Such rapidly developing research directions as phasefield modeling, laser treatment of surfaces, nanostructures, and influence of external fields on the microstructure formation are specially covered in this issue.

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Dataset of annual metal scrap circularity of titanium industry in China from 2005 to 2020

Wang

2023

Sci Data

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Titanium products, regarded as a strategic metal by many national governments, play important and irreplaceable roles in national defence and military applications. China has built a large-scale titanium industrial chain, and its status and development pathways will greatly affect the global market. Several researchers contributed a set of reliable statistical data to bridge the knowledge gap in evaluating the industrial layout and the entire structure of China’s titanium industry with little literature information regarding the management of metal scrap in the manufacturers of titanium products. To bridge this data gap, we present a dataset of annual metal scrap circularity to uncover China’s evolution of the titanium industry today, which contains off-grade titanium sponge, low-grade titanium scrap, and recycled high-grade titanium swarf with the relevant circularity of the titanium industry in China at the national level from 2005 to 2020.

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VAR ingot solidification model and its verification

Cited by 4 publications

References 8 publications

Simulation of Solidification Structure in the Vacuum Arc Remelting Process of Titanium Alloy TC4 Based on 3D CAFE Method

Simulation of Solidification Structure in the Vacuum Arc Remelting Process of Titanium Alloy TC4 Based on 3D CAFE Method

Modeling and simulation of heat/mass transport, nucleation and growth kinetics in phase transformations

Dataset of annual metal scrap circularity of titanium industry in China from 2005 to 2020

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