Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot

Zhang, C.; Bao, Y.; Wang, M.; Zhang, L.

doi:10.1515/afe-2016-0021

Cited by 11 publications

(11 citation statements)

References 7 publications

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“…Cone-shaped open voids observed at the top of the riser and closed voids located deeper within the solidifying system are the most frequently encountered macroscopic defects [1][2]. Extensive discussions on numerical models concerning the formation of shrinkage defects can be found in the literature [3][4][5][6][7][8][9][10][11]. Books [3,4] provide fundamental insights into the formation of shrinkage cavities during casting solidification.…”

Section: Introductionmentioning

confidence: 99%

“…In one particular study [5], the focus lies on predicting the distribution of defects in a casting with a simple shape. As computational power has increased, researchers have been able to model the formation of shrinkage cavities in three-dimensional spaces [6][7][8][9][10][11]. This has been achieved using proprietary software [6] as well as commercially available software [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…As computational power has increased, researchers have been able to model the formation of shrinkage cavities in three-dimensional spaces [6][7][8][9][10][11]. This has been achieved using proprietary software [6] as well as commercially available software [7][8][9][10][11]. These models also consider additional factors such as porosity formation [8] and the macrosegregation of components [7,9,10].…”

Section: Introductionmentioning

confidence: 99%

“…This has been achieved using proprietary software [6] as well as commercially available software [7][8][9][10][11]. These models also consider additional factors such as porosity formation [8] and the macrosegregation of components [7,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigations of the Influence of Cooling Rate during Solidification on Shrinkage Cavities and Grain Formation Process

Skrzypczak,

Węgrzyn-Skrzypczak,

Sowa

2023

Acta Phys. Pol. A

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The presented work focuses on the numerical modeling of the solidification process, with a particular emphasis on two significant physical phenomena: shrinkage cavities and grain formation, which are influenced by the cooling rate. Cooling rate plays a crucial role in determining grain size and casting defects. Higher cooling rates result in finer grain structures, while slower rates promote larger grains. During solidification, atoms arrange into crystalline structures, forming grains. The cooling rate affects grain growth kinetics. Faster rates lead to smaller grains due to limited atomic diffusion, while slower rates allow for larger grain growth. Shrinkage cavities, localized regions in solidified material, form due to volume contraction during cooling, negatively impacting mechanical properties. In this paper, the main assumptions of the mathematical and the numerical model are presented. The numerical description of the problem is based on the finite element method, which is a widely used numerical technique for solving complex physical problems. The algorithm for the shrinkage cavity creation process is described, and an original computer program was developed using the numerical model. The computer simulation was conducted to obtain distributions of temperature, grain size, as well as the position and shapes of the shrinkage cavities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Investigations of the Influence of Cooling Rate during Solidification on Shrinkage Cavities and Grain Formation Process

Skrzypczak,

Węgrzyn-Skrzypczak,

Sowa

2023

Acta Phys. Pol. A

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“…Presented paper only considers the shrinkage of the casting during solidification. Numerical modelling of the process of shrinkage cavity formation is widely discussed in literature [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical model of solidification process of Fe-C alloy taking into account the phenomenon of shrinkage cavity formation

2019

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Mathematical and numerical models of Fe-C alloy solidification process based on the finite element method (FEM) are presented in the paper. The phenomenon of the defect called "shrinkage cavity" is introduced to the model. It is very important aspect of presented work which makes possible the prediction of the location and shape of mentioned defect depending on the geometry of the casting and cooling condition of the process. An original computer program using Visual C++ environment has been written in order to simulate described process. The results of computer calculations of the three-dimensional solidification problem of the casting with riser are presented and discussed in details.

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Shrinkage Porosity Model for Steel Ingots with Reduction Deformation during Solidification

Zhang,

Nian,

Zhang

et al. 2024

steel research int.

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This article studies the shrinkage porosity model for steel ingots with reduction deformation during solidification, and examines the effect of reduction deformation on the shrinkage porosity. Initial investigations involve conducting experiments on reduction deformation during steel ingot solidification, entailing laboratory‐based high‐temperature melting and jack reduction process, with a focus on diverse reduction amounts and cooling times before reduction. Post‐experimental procedures include sample sectioning, acid etching, and low‐magnification structural analysis. Following this, numerical simulations are employed to model the solidification and reduction deformation processes of the steel ingot. Ultimately, a shrinkage porosity criterion model is developed, integrating the equivalent plastic strain resulting from reduction deformation during solidification into the micro‐porosity criterion model. This approach facilitates the prediction of micro‐porosity distribution following reduction deformation. Findings reveal that the shrinkage porosity criterion G2L−5/3ε/εa, which includes the equivalent plastic strain coefficient, effectively predicts the distribution of micro‐porosity subsequent to reduction deformation during steel ingot solidification. A higher reduction amount during the solidification process corresponds to a lowered level of internal micro‐porosity.

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Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot

Cited by 11 publications

References 7 publications

Numerical Investigations of the Influence of Cooling Rate during Solidification on Shrinkage Cavities and Grain Formation Process

Numerical Investigations of the Influence of Cooling Rate during Solidification on Shrinkage Cavities and Grain Formation Process

Numerical model of solidification process of Fe-C alloy taking into account the phenomenon of shrinkage cavity formation

Shrinkage Porosity Model for Steel Ingots with Reduction Deformation during Solidification

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