Porosity in Turbine Blades Cast into New Shell Moulds Made of SiC Based Ceramics

Abstract:

The subject matter of the paper is the quantitative evaluation of gaseous and shrinkage porosity in the turbine blades using quantitative metallography methods. The research material consisted of blades with a polycrystalline structure made of IN 713C superalloys. Three different shell mould systems were used during the investment casting: shell A - typical industrial shell mould system and used in this work as the reference; shell B – similar to version A, but SiC grit was applied as back-up stucco; shell C – entirely SiC shell mould system. The blades of superalloy IN-713C cast into the wholly SiC shell mould system have revealed much lower porosity as compared to the blades cast into the typical industrial shell mould system.

• Periodical: Solid State Phenomena (Volume 212)
• Pages: 255-258
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.212.255
• Online since: December 2013
• Authors: Stanisław Roskosz
• Keywords: Investment Casting, Nickel Based Superalloy in 713C, Porosity, Quantitative Metallography, Turbine Blade

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