Improvement of Hydrogen-Resistant Gas Turbine Engine Blades: Single-Crystal Superalloy Manufacturing Technology
Alexander I. Balitskii,
Yulia H. Kvasnytska,
Ljubomyr M. Ivaskevych,
Katrine H. Kvasnytska,
Olexiy A. Balitskii,
Radoslaw M. Miskiewicz,
Volodymyr O. Noha,
Zhanna V. Parkhomchuk,
Valentyn I. Veis,
Jakub Maciej Dowejko
Affiliations
Alexander I. Balitskii
Department of Strength of the Materials and Structures in Hydrogen-Containing Environments, Karpenko Physico-Mechanical Institute, National Academy of Sciences of Ukraine, 79-601 Lviv, Ukraine
Yulia H. Kvasnytska
Department of Physico-Chemistry of Casting Processes, Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 03-142 Kyiv, Ukraine
Ljubomyr M. Ivaskevych
Department of Strength of the Materials and Structures in Hydrogen-Containing Environments, Karpenko Physico-Mechanical Institute, National Academy of Sciences of Ukraine, 79-601 Lviv, Ukraine
Katrine H. Kvasnytska
Department of Physico-Chemistry of Casting Processes, Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 03-142 Kyiv, Ukraine
Olexiy A. Balitskii
Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Radoslaw M. Miskiewicz
Research Center for Management of Energy Sector, Institute of Management, University of Szczecin, 71-004 Szczecin, Poland
Volodymyr O. Noha
Department of Physico-Chemistry of Casting Processes, Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 03-142 Kyiv, Ukraine
Zhanna V. Parkhomchuk
Department of Physico-Chemistry of Casting Processes, Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 03-142 Kyiv, Ukraine
Valentyn I. Veis
Department of Physico-Chemistry of Casting Processes, Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 03-142 Kyiv, Ukraine
Jakub Maciej Dowejko
Research Center for Management of Energy Sector, Institute of Management, University of Szczecin, 71-004 Szczecin, Poland
This paper presents the results of an analysis of resistance to hydrogen embrittlement and offers solutions and technologies for manufacturing castings of components for critical applications, such as blades for gas turbine engines (GTEs). The values of the technological parameters for directional crystallization (DC) are determined, allowing the production of castings with a regular dendritic structure of the crystallization front in the range of 10 to 12 mm/min and a temperature gradient at the crystallization front in the range of 165–175 °C/cm. The technological process of making GTE blades has been improved by using a scheme for obtaining disposable models of complex profile castings with the use of 3D printing for the manufacture of ceramic molds. The ceramic mold is obtained through an environmentally friendly technology using water-based binders. Short-term tensile testing of the samples in gaseous hydrogen revealed high hydrogen resistance of the CM-88 alloy produced by directed crystallization technology: the relative elongation in hydrogen at a pressure of 30 MPa increased from 2% for the commercial alloy to 8% for the experimental single-crystal alloy.
