Improvement of Hydrogen-Resistant Gas Turbine Engine Blades: Single-Crystal Superalloy Manufacturing Technology.

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 application of transcranial magnetic stimulation for the functional diagnostics of motor disturbances in the patients presenting with ischemic stroke].

Aim: To estimate the informative value of transcranial magnetic stimulation (TMS) as a tool for the functional diagnostics of motor disturbances and to evaluate its remedial potential in the patients presenting with ischemic stroke (IS) and motility disorders in the acute phase of the disease and during the early rehabilitation period.

Materials And Methods: The present study included the comprehensive examination of 112 patients (mean age 59.2 +/- 5.