Abstract
Microporosity prediction is very important for the production of complex-shaped superalloy investment castings in the aviation industry. In this study, the dimensionless Niyama criterion developed by Kent D.Carlson was used for microporosity prediction in nickel-based superalloy investment casting. The solid fraction-temperature curve and the total solidification shrinkage of the alloy were calculated using JMatPro software. Relationship between the volume percentage of microporosity and the dimensionless Niyama values were constructed. At the same time, Quantitative Metallographic measurements of the microporosity of the practical thin-wall casting were carried out. The results showed that the prediction agreed well with the experiment in general, except for some thick-wall sites in the casting.
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Wang, J. (2013). Prediction of Microporosity in Complex Thin-Wall Castings with the Dimensionless Niyama Criterion. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_319
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DOI: https://doi.org/10.1007/978-3-319-48764-9_319
Publisher Name: Springer, Cham
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