Application of energy criterion to evaluate fatigue life of nickel alloy obtained by selective laser melting

Ryzhkov P.V., Gorbovets M.A.
UDC
669.018.44:669.245
DOI
10.18577/2307-6046-2025-0-12-149-169
Article PDF (Russian) (1.87 MB)
How to cite
Ryzhkov P.V., Gorbovets M.A. Application of energy criterion to evaluate fatigue life of nickel alloy obtained by selective laser melting // Proceedings of VIAM. 2025. No. 12. DOI: 10.18577/2307-6046-2025-0-12-149-169. URL: https://test.viam.ru/en/journal/2025/12/13
Keywords
mechanical properties, fatigue characteristics, heat-resistant wrought nickel alloys, material models, fatigue crack growth rate, cyclic plasticity
Abstract

Using laboratory samples as an example, a damage development model combining the assessment of the durability of the nucleation and propagation stages was tested. The LCF criterion based on the energy criterion determines the durability of the first stage of the kinetic diagram. The choice of the initial crack length for calculating the second stage is determined by the beginning of the linear section of the kinetic diagram. To calculate the residual durability, it is necessary to have a curve of the dependence of the SIF on the crack length for the geometry of the sample, the type of loading and the shape of the crack. The durability prediction error for the proposed model was 20 %.

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