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

Skrzypczak, Tomasz; Węgrzyn-Skrzypczak, Ewa; Sowa, L.

doi:10.1051/matecconf/201925402009

Cited by 2 publications

(3 citation statements)

References 3 publications

(3 reference statements)

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“…Mathematical description of the problem as well as the basis of numerical model including shrinkage cavity formation are presented in [10]. Presented paper contains only the most important aspects of these models.…”

Section: Mathematical and Numerical Modelsmentioning

confidence: 99%

Investigation of the impact of geometry of the riser on the location and shape of shrinkage cavity

2019

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During solidification process the phenomenon of shrinkage cavity is often observed. It has negative impact on the structure and physical properties of the final product. To minimize the negative effect of shrinkage cavity the riser is commonly introduced to the solidifying system. If the riser is properly designed shrinkage cavity rather appears within its volume than in the other parts of the casting. It makes possible to obtain defect-free main part of the casting. Presented work shows the impact of the different shapes of the riser on the localization of the shrinkage cavity. The results are obtained with the use of an original computer program based on the finite element method (FEM). They are presented for three-dimensional case of solidification of three types of the riser. The comparison of the results is discussed in details.

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Section: Mathematical and Numerical Modelsmentioning

confidence: 99%

Investigation of the impact of geometry of the riser on the location and shape of shrinkage cavity

2019

Self Cite

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“…Important part of presented model is the procedure of multiple shrinkage cavities development process. Similar procedure suitable for single defects was used in [10]. Main assumptions of developed algorithm are as follows:…”

Section: Numerical Modelmentioning

confidence: 99%

“…Each time step contains following operations:  Using known distribution of temperature T j and boundary conditions new temperature field T j+1 is obtained according to the scheme (10).…”

mentioning

confidence: 99%

Archives of Foundry Engineering

Skrzypczak¹,

Sowa²,

Węgrzyn-Skrzypczak³

2019

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Presented paper shows the mathematical and numerical approaches for modelling of binary alloy solidification solved by the Finite Element Method (FEM). The phenomenon of shrinkage cavities formation process is included in the numerical model. Multiple macroscopic cavities can be modelled within the single casting volume. Solid, liquid and gaseous phases with different material properties are taken into account during solidification process. Mathematical model uses the differential equation of heat diffusion. Modification of specific heat is used to describe the heat releasing during liquid-solid phase change. Numerical procedure of shrinkage cavities evolution is based on the recognition of non-connected liquid volumes and local shrinkage computation in the each of them. The recognition is done by the selection of sets of interconnected nodes containing liquid phase in the finite element mesh. Original computer program was developed to perform calculation process. Obtained results of temperature and shrinkage cavities distributions are presented and discussed in details.

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

Cited by 2 publications

References 3 publications

Investigation of the impact of geometry of the riser on the location and shape of shrinkage cavity

Investigation of the impact of geometry of the riser on the location and shape of shrinkage cavity

Archives of Foundry Engineering

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