Metadata (abstracts and keywords) for the articles in the journal
Dudin D.S., Keller I.E. Description of sulfide-oxide and chloride corrosion of heat-resistant alloys taking into account stresses. I. Mathematical model // Vestnik I. Yakovlev Chuvach State Pedagogical University. Series: Mechanics of a limit state . 2025. № 1(63). p. 123-133
Author(s):
Dudin D.S., Keller I.E.
Index of UDK:
539.3+539.219.3
DOI:
10.37972/chgpu.2025.63.1.003
Title:
Description of sulfide-oxide and chloride corrosion of heat-resistant alloys taking into account stresses. I. Mathematical model
Keywords:
high-temperature corrosion, model, interdiffusion, stresses, elastoplasticity, chemical reactions, coupled processes
Abstracts:
Sulfide-oxide and chloride corrosion has a significant impact on the life of gas turbine engine parts. Under the influence of high temperatures, oxygen and sulfur penetrate through the surface of the heat-resistant alloy, changing its physico-mechanical properties, which leads to destruction under the influence of high external loads. The mutual diffusion of components and chemical reactions change the local chemical composition and density of the material, creating fields of intrinsic deformations and residual stresses. Stresses and its gradients affect the rates of mutual diffusion of components and chemical reactions. The motion of the components is caused by convective transport and diffusion flows relative to the material. However, to describe the mutual diffusion of components in atomic crystals, independent diffusion fluxes are determined relative to markers - inert particles that do not affect chemical and diffusion processes in the material. A related model is formulated that combines a marker approach to the description of diffusion and a material approach to the description of deformation. It takes into account the simplest mechanism of sulfide-oxide corrosion of a two-component heat-resistant alloy. Volumetric deformations of the swelling of the material volume due to diffusion and chemical processes and shear elastoplastic deformations of metal and corrosion products at high temperatures are taken into account, due to which stresses relax in the considered design scheme. The solution of the thermodynamic inequality for the considered state variables and processes gives cross terms and dependence on the average voltage gradient in physical relations for diffusion flows, the dependence of chemical reaction rates on the average voltage. The balance equations of chemical composition include the rate of convective movement of the material. It is assumed that these model connectivity elements will be important for describing the process of sulfide-oxide and chloride corrosion of metal alloys, taking into account the influence of technological residual and operational stresses on diffusion and chemical processes and the occurrence of intrinsic deformations and residual stresses due to these processes.
The contact details of authors:
Dmitrii S. Dudin, Leading Engineer of the Laboratory of Nonlinear Mechanics of Solids; e-mail: dudin.d@icmm.ru;
https://orcid.org/0000-0002-1911-8899; AuthorID: 1110725
Ilya E. Keller, Doctor of Physical and Mathematical Sciences, Head of the Laboratory of Nonlinear Mechanics of Solids; e-mail: kie@icmm.ru; https://orcid.org/0000-0001-9914-8870; AuthorID: 11695
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