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The subject matter of the paper is the quantitative evaluation of gaseous and shrinkage porosity in construction elements of a low-pressure aircraft engine turbine using quantitative metallography methods. The research material consisted of blades and blade segments with a polycrystalline structure made of IN 713C and MAR M247 superalloys.

Evaluation of Porosity of Precision Castings Made of High-Temperature Creep Resisting Nickel Superalloys