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New criterion for estimating probability of formation of microporosity in castings
Engineering Education # 08, August 2013
DOI: 10.7463/0813.0585558
This paper presents a new dimensionless criterion of formation of microporosity, which considers a set of essential technology factors, including atmospheric and metallostatic pressure, alloy’s gas saturation. The criterion is based only on the measured or controllable parameters and does not demand additional experimental data. A feature of the criterion is absence of the radius of a critical germ of a micropore. An estimation of the distance between secondary axes of dendrites is used instead. The criterion is recommended for using in systems of simulation of casting hardening for more accurate prediction of formation of microporosity.
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