PSI - Issue 65

ScienceDirect Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 65 (2024) 248–254

The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Diagnosis of abrasive wear of steels by machine learning in Python M.A. Skotnikova*, A.Y. Ryabikin, A.D. Shestakov, L.D. Tuptei, A.D. Novokshenov Peter the Great St.Petersburg Polytechnic University, Russia Comparative tribotechnical tests of wear-resistant equal-hard steels of the martensitic class Hardox 450, Quard 450 in comparison with ferrite-pearlite steel 09G2S were carried out. The wear resistance “  ” increased in the direction of 1.0 → 7.9 → 18.1 in steels 09G2S → Hardox 450 → Quard 450, respectively. As it turned out, after testing for abrasive wear of samples made of Quard 450 steel with maximum wear resistance, traces of martensitic transformation were found on the friction sites. Using machine learning in Python, graphs of fluctuations of friction moments in time of the studied steels were constructed, their smoothing (averaging) by the Hannah method was carried out. The Fourier transform was performed, the amplitude-frequency characteristics of the friction moments were calculated and frequency spectrograms were constructed. It is shown that a decrease in the amplitude of the sinusoids of the first (main) harmonic occurred in the direction of 3.40 → 2.15 → 1.40 in steels 09G2S → Hardox 450 → Quard 450, respectively. Unlike the 09G2S and Hardox 450 steels, in the Quard 450 steel with maximum wear resistance, the second harmonic was split into two with amplitudes of 0.85 and 0.70. The spectra of two exciting forces (abrasive wear and structural-phase (martensitic) transformation) were found in it, strengthening the surface in the contact zone and increasing its wear resistance. © 2024 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers Keywords: Friction moment; steel; martensitic transformation; Fourier transform; spectrogram. The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Diagnosis of abrasive wear of steels by machine learning in Python M.A. Skotnikova*, A.Y. Ryabikin, A.D. Shestakov, L.D. Tuptei, A.D. Novokshenov Peter the Great St.Petersburg Polytechnic University, Russia Abstract Comparative tribotechnical tests of wear-resistant equal-hard steels of the martensitic class Hardox 450, Quard 450 in comparison with ferrite-pearlite steel 09G2S were carried out. The wear resistance “  ” increased in the direction of 1.0 → 7.9 → 18.1 in steels 09G2S → Hardox 450 → Quard 450, respectively. As it turned out, after testing for abrasive wear of samples made of Quard 450 steel with maximum wear resistance, traces of martensitic transformation were found on the friction sites. Using machine learning in Python, graphs of fluctuations of friction moments in time of the studied steels were constructed, their smoothing (averaging) by the Hannah method was carried out. The Fourier transform was performed, the amplitude-frequency characteristics of the friction moments were calculated and frequency spectrograms were constructed. It is shown that a decrease in the amplitude of the sinusoids of the first (main) harmonic occurred in the direction of 3.40 → 2.15 → 1.40 in steels 09G2S → Hardox 450 → Quard 450, respectively. Unlike the 09G2S and Hardox 450 steels, in the Quard 450 steel with maximum wear resistance, the second harmonic was split into two with amplitudes of 0.85 and 0.70. The spectra of two exciting forces (abrasive wear and structural-phase (martensitic) transformation) were found in it, strengthening the surface in the contact zone and increasing its wear resistance. © 2024 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers Keywords: Friction moment; steel; martensitic transformation; Fourier transform; spectrogram. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers Abstract

1. Introduction 1. Introduction

The physical modeling of a frictional mechanical system (FMS) is called tribological studies of physically similar processes on standard friction machines that preserve the physical nature of phenomena, but reproduce them in The physical modeling of a frictional mechanical system (FMS) is called tribological studies of physically similar processes on standard friction machines that preserve the physical nature of phenomena, but reproduce them in

* Corresponding author. Tel.: +7-921-987-8752. E-mail address: skotnikova@mail.ru * Corresponding author. Tel.: +7-921-987-8752. E-mail address: skotnikova@mail.ru

2452-3216 © 2024 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers 2452-3216 © 2024 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of MRDMS 2023 organizers 10.1016/j.prostr.2024.11.037