Modeling of Multiscale and Multiphase Phenomena in Material Processing

Ludwig, Andreas; Kharicha, Abdellah; Wu, Menghuai

doi:10.1002/9781118364697.ch18

Cited by 1 publication

(4 citation statements)

References 40 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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