S. A. Nevskii, L. P. Bashchenko, V. E. Gromov, A. D. Filyakov
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Abstract
Using the finite-element method, the problem of thermoelastic stress distribution in a high-speed R2M9 steel coating on a 30KhGSA steel substrate has been solved. Stress distributions in the coating versus distance from the surface have been obtained. It has been found that normal component σyy of the stress tensor varies nonmonotonically along the rounding radius and monotonically along the central axis. It has also been shown that the von Mises stress intensity rises toward the coating boundary, as a result of which a minimum appears in the dependence of the microhardness on distance to the coating boundary. Stability analysis of carbide phase inclusions subjected to thermoelastic stresses has been carried out. It has turned out that inclusions 10 μm or greater in size are unstable if their thickness is about 1 μm or less.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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