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- W575005443 abstract "The phase transformations in cast iron are highly dependent on the kinetics and therefore also strongly influenced by the cooling rate. The transformation of liquid to solid involves formation of phases with a variety of densities. The resulting volume change leads often to the formation of porosity or excess of material. The excess of material helps to give a sound casting but if the geometry is not favourable the metal may penetrate the sand mould material. This balance between shrinkage and expansion is important to understand. This is a fundamental problem in producing iron castings without shrinkage or penetration defects. The volume changes of the phases can not be measured by direct methods. However a combination of modelling and experiments may lead to an improved understanding.The paper will discusses the modelling of volumes of cast iron phases using molar volume models. The molar volumes are calculated by using regular mixing models containing different atoms. The volume of iron with carbon dissolved in austenite has been modelled by using a sub-lattice molar volume model. The modelling of the volumes are compared with experiments.The models are implemented in a computer program which simulates the kinetics of the phase formation. Resulting volume changes of the system are predicted." @default.
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- W575005443 date "1999-05-01" @default.
- W575005443 modified "2023-09-27" @default.
- W575005443 title "Modelling of volumes in cast iron solidification to predict shrinkage and expansion defects" @default.
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- W575005443 doi "https://doi.org/10.1080/13640461.1999.11819322" @default.
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