HIGH PARAMETER HYDROGEN AFFECTS ON THE LONG-TERM STRENGTH OF THE MULTI-LAYER COMPOSITE SHELLS UNDER THE TEMPERATURE CREEP
This work discribes research methods of complex problem solution to estimate strength and durability of multiple layer shells of rotation with an account of plastic deformations, temperature creep, the hydrogen corrosion and degradation of material’s properties in time. The practical calculation of the stressed – strained state accounts of the two-layer composite conical shell is resolved. An internal layer is made of chrome – nickel alloy, which is directed to the hydrogen-containing medium, an external layer is made of low – carbon steel. The shell was under the temperature at 500 °C. The protective layer thickness was varied from 0 to 25 mm, and the pressure was varied from 2 to 3 MPa. The components of stressed – strained state accounts and the time to failure of the shell of rotation were carried out. The article provides guidance for the selection of the protective layer’s optimum thickness of the shell.