PSI - Issue 65

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

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Procedia Structural Integrity 65 (2024) 48–55

The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Hardness profile reconstruction based on eddy current measurements A.V. Byzov a, *, A.E. Konygin a,b , D.G. Ksenofontov a , O.N. Vasilenko a a M. N. Mikheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, S. Kovalevskoy St., Ekaterinburg, 620137, Russia b Institute of Physics and Technology, Ural Federal University named after the First President of Russia B. N. Yeltsin, 19 Mira St., Ekaterinburg, 620002, Russia The paper presents a technique of hardness profile recovery of surface-hardened flat products by means of eddy current measurements. A transformer eddy current transducer is used, so the relative reflected voltage is the informative parameter of eddy current testing. The objects of the study are complex samples consisting of plates made of the 60C2A steel quenched at 870 C as a hardened layer and an unhardened steel 3 specimen as a core. The frequencies are calculated at which the penetration depth of eddy currents into the workpiece is controlled. The work resulted in reconstructed hardness profiles for all available samples. The calculated and real hardness profiles have a similar behavior, which means that this technique can be used to determine the hardness profile of surface-hardened flat products. This result can be used for research and production purposes. © 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: eddy current; surface hardening; hardness profile reconstruction; voltage; depth of hardened layer; mathematical treatment The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Hardness profile reconstruction based on eddy current measurements A.V. Byzov a, *, A.E. Konygin a,b , D.G. Ksenofontov a , O.N. Vasilenko a a M. N. Mikheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, S. Kovalevskoy St., Ekaterinburg, 620137, Russia b Institute of Physics and Technology, Ural Federal University named after the First President of Russia B. N. Yeltsin, 19 Mira St., Ekaterinburg, 620002, Russia Abstract The paper presents a technique of hardness profile recovery of surface-hardened flat products by means of eddy current measurements. A transformer eddy current transducer is used, so the relative reflected voltage is the informative parameter of eddy current testing. The objects of the study are complex samples consisting of plates made of the 60C2A steel quenched at 870 C as a hardened layer and an unhardened steel 3 specimen as a core. The frequencies are calculated at which the penetration depth of eddy currents into the workpiece is controlled. The work resulted in reconstructed hardness profiles for all available samples. The calculated and real hardness profiles have a similar behavior, which means that this technique can be used to determine the hardness profile of surface-hardened flat products. This result can be used for research and production purposes. © 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: eddy current; surface hardening; hardness profile reconstruction; voltage; depth of hardened layer; mathematical treatment © 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

In modern industry, various methods are often used to improve the wear resistance of steel products; most often this effect is achieved by surface hardening. These techniques preserve the original physical properties of the core In modern industry, various methods are often used to improve the wear resistance of steel products; most often this effect is achieved by surface hardening. These techniques preserve the original physical properties of the core

* Corresponding author. Tel.: +7-904-170-8448. E-mail address: byzovav@imp.uran.ru * Corresponding author. Tel.: +7-904-170-8448. E-mail address: byzovav@imp.uran.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.2024.11.009