Anosov M.S., Ryabov D.A., Chernigin M.A., Solovyov A.A. Non-Destructive Testing of the Accumulation of Fatigue Damage in Steel Sv-09G2S Produced by Wire Arc Additive Manufacturing

DOI: 10.18503/1995-2732-2023-21-2-47-53

Abstract

The rapid development of the technology of wire arc additive manufacturing of materials that differ significantly from conventional materials in their structure and properties entails studying the nature of changes in the informative parameters of the structural degradation of these groups of alloys to ensure their non-destructive testing during operation. The paper describes the studies on the accumulation of structural damage under fatigue loading of steel 09G2S produced by WAAM technology, using a combination of non-destructive testing methods (physical acoustics, magnetic particle inspection, optical studies). The proposed informative characteristics include such parameters as the fractal dimension of the microstructure in the operating area (DF), the acoustic parameter (D), and coercive force (Hc). It is shown that during fatigue loading individual grains of the material show a large number of slip bands and a subsequent increase in both their number and thickness already at the starting stage of loading. It has been established that the obtained relationships of the non-destructive testing characteristics have a certain correlation and reflect structural changes in the material. Thus, during the fatigue loading process, before the macrocrack formation, there is a monotonic decrease in the fractal dimension of the microstructure and the acoustic parameter, as well as an increase in coercive force. After the macrocrack formation the nature of the relationship between these characteristics changes and there is a slight increase in the acoustic parameter and a decrease in coercive force to the initial values. The established relationships of the informative parameters of non-destructive testing methods contribute to shaping an unambiguous opinion about the stage of fracture of the material and its residual life and may be used to diagnose materials during their testing and operation.

Keywords

3D printing, WAAM technology, fatigue loading, fractal analysis, non-destructive testing

For citation

Anosov M.S., Ryabov D.A., Chernigin M.A., Solovyov A.A. Non-Destructive Testing of the Accumulation of Fatigue Damage in Steel Sv-09G2S Produced by Wire Arc Additive Manufacturing. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2023, vol. 21, no. 2, pp. 47-53. https://doi.org/10.18503/1995-2732-2023-21-2-47-53

Maksim S. Anosov – PhD (Eng.), Associate Professor, Alekseev Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-8150-9332

Dmitrii A. Ryabov – postgraduate student, researcher, Alekseev Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0002-0486-598X

Mikhail A. Chernigin – postgraduate student, engineer, Alekseev Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it..

Aleksandr A. Solovyov – master, Alekseev Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia.

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