Investigation of the effect of pulsed surfacing on the state of a heat-resistant single-crystal alloy

Abstract

The article is devoted to the study of elemental and phase compositions, microstructure and mechanical properties of heat-resistant single-crystal intermetallic alloy used in the manufacture of cooled blades of high-temperature gas turbines of power equipment. State of monocrystal alloy after carrying out comparative experiments by methods of pulsed build-up and argon-arc build-up is investigated. It has been found that the pulsed build-up does not result in the formation of a zone of thermal influence and changes in the state of the base material. This method is recommended to restore defective areas and geometric dimensions of parts as part of resource-saving technologies.

Keywords:

• Single crystal intermetallic alloy
• anisotropy
• microhardness
• microplasticity limit
• yield point
• pulse buildup
• argon-arc buildup
• zone of thermal influence
• resource-saving technology
• blades of high-temperature gas turbines

Acknowledgements

The original work was made as a part of the state assignment of the Institute of Applied Physics of the Russian Academy of Sciences to carry out fundamental scientific research for 2021–2023 years on topic No. 0030-2021-0025.