Features of crack growth at the non-metallic inclusions in steels

Keywords

non-metallic inclusions, cracks, steel, plastic deformation, laser processing, high-temperature annealing, microcomposite structure, fracture.

Cite as

Gubenko S. I. Features of crack growth at the non-metallic inclusions in steels. Physicochemical Mechanics of Materials. 2025. 61(6), 70-76.

https://doi.org/10.15407/pcmm2025.06.070

Abstract

The features of crack propagation near non-metallic inclusions of different types, as well as possible methods of retardation of their growth by changing loading conditions and applying various treatments, are established for various steels. It is shown that the propagation of cracks is accompanied by their branching on destroyed inclusions and in their clusters, as well as on structural defects of the steel matrix. It is established that plastic sulfide inclusions, localization of relaxation processes in the steel matrix, and changes in the stress state near the inclusion under various loading conditions can retard crack propagation. The effect of local microcomposite structures in the steel matrix obtained by high-energy treatments on the features of crack propagation and retardation near non-metallic inclusions is shown.

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