PSI - Issue 18

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

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Procedia Structural Integrity 18 (2019) 802–808

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. In this work the authors suggests the in-situ method for monitoring the fracture initiation and study kinetic of defect evolution based on analysis of magnetic field interaction with material. It is shown rapidly dynamic of registered signals on final stage of fatigue test. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Abstract The processes of formation “fish eye” structure is still an issue in scientific community. This interest initiated by active applicati of metal construction in technique behind the cust mary cyclic servic life. This kind of failure is most da gerous i reason undersurface initiation and uncontrollable crack propagation. The posteriori structural analysis cannot give information on the kin tics of the critical defect evolution leadi g to the failure of the sample. The goal of the study is combination of posteriori i vestigation of tested samples and in-situ monitoring process using nondestructive technique. In this work the authors suggests the in-situ method for monitoring the fracture initi tion and study kinetic of defect evolution based on analysis of magnetic field interaction with material. It is shown rapidly dynamic of registered signals on final stage of fatigue test. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 1. Introduction The use of structures made of high-strength steels under cyclic loads is a common subject of the modern technical process. Ensuring the safety of operation of such structural elements requires a detailed study of the processes associated with the formation and development of fatigue failure, as well as the development of non-destructive testing methods for conducting diagnostic activities and timely maintenance of structures. Studies of the processes of destruction of materials under fatigue loading conditions have shown that the development of fatigue cracks is possible 25th International Conference on Fracture and Structural Integrity Experimental study of high-strength steel under VHCF with external alternating magnetic field Prokhorov A.,* a Plekhov O., a Sudakov A., a Gladkovskii S., b Kuteneva S. b 25th International Conference on Fracture and Structural Integrity Experimental study of high-strength steel under VHCF with external alternating magnetic field Prokhorov A.,* a Plekhov O., a Sudakov A., a Gladkovskii S., b Kuteneva S. b a Institute of continous media mechanics UB RAS, 1 Ak. Koroleve str. Perm 614013, Russia b Institute of Engineering Science, UB RAS, 34 Komsomolskaya str., Ekaterinburg 620049, Russia a Institute of continous media mechanics UB RAS, 1 Ak. Koroleve str. Perm 614013, Russia b Institute of Engineering Science, UB RAS, 34 Komsomolskaya str., Ekaterinburg 620049, Russia Abstract The processes of formation “fish eye” structure is still an issue in scientific community. This interest initiated by active application of metal construction in technique behind the customary cyclic service life. This kind of failure is most dangerous in reason undersurface initiation and uncontrollable crack propagation. The posteriori structural analysis cannot give information on the kinetics of the critical defect evolution leading to the failure of the sample. The goal of the study is combination of posteriori investigation of tested samples and in-situ monitoring process using nondestructive technique. Keywords: Very High Cycle Fatigue, fish-eye, AISI 420, magnetic field detector, Keywords: Very High Cycle Fatigue, fish-eye, AISI 420, magnetic field detector, 1. Introduction The use of structures made of high-strength steels under cyclic loads is a common subject of the modern technical process. Ensuring the safety of operation of such structural elements requires a detailed study of the processes associated with the formation and development of fatigue failure, as well as the development of non-destructive testing methods for conducting diagnostic activities and timely maintenance of structures. Studies of the processes of destruction of materials under fatigue loading conditions have shown that the development of fatigue cracks is possible

* Corresponding author. Tel.: +7(342)-237-83-17 E-mail address: Prokhorov.a@icmm.ru * Corresponding author. Tel.: +7(342)-237-83-17 E-mail address: Prokhorov.a@icmm.ru

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.229