PSI - Issue 65

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

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Procedia Structural Integrity 65 (2024) 269–274

The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Plastic strain localization in the AMg6 alloy under dynamic loading Mikhail Sokovikov a, *, Mikhail Simonov b , Vasiliy Chudinov a , Sergey Uvarov a , Vladimir Oborin a , Oleg Naimark a a Institute of Continuous Media Mechanics of the Ural Branch of the Russian Academy of Sciences, 1 Ak. Korolev Street, Perm, 614013, Russia b Perm National Research Polytechnic University, 29 Komsomolsky prospect, Perm, 614990, Russia This paper aims to further developing the idea that one of the mechanisms responsible for plastic strain localization in dynamically loaded materials occurs due to structural transitions in microdefect ensembles. For this purpose, dynamic load tests were conducted using the split Hopkinson pressure bar. During dynamic deformation, the characteristic strain localization stages were identified by studying the temperature fields measured in-situ with a high-speed infrared camera CEDIP Silver 450M. The temperature values recorded in a strain localization zone do not support already existing concepts that the mechanism of strain localization is caused by thermoplastic instability. Our structural analysis shows evidence of a correlated behavior of the ensemble of defect, which can be classified as a structural transition that leads to strain localization. The results of experimental and structural studies allow us to suggest that one of the mechanisms of plastic strain localization in the AMg6 alloy tested under specified loading rates is caused by jumpwise processes in the defect structure of the alloy. © 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: dynamic loading, plastic strain localization, infrared thermography, structural studies The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Plastic strain localization in the AMg6 alloy under dynamic loading Mikhail Sokovikov a, *, Mikhail Simonov b , Vasiliy Chudinov a , Sergey Uvarov a , Vladimir Oborin a , Oleg Naimark a a Institute of Continuous Media Mechanics of the Ural Branch of the Russian Academy of Sciences, 1 Ak. Korolev Street, Perm, 614013, Russia b Perm National Research Polytechnic University, 29 Komsomolsky prospect, Perm, 614990, Russia Abstract This paper aims to further developing the idea that one of the mechanisms responsible for plastic strain localization in dynamically loaded materials occurs due to structural transitions in microdefect ensembles. For this purpose, dynamic load tests were conducted using the split Hopkinson pressure bar. During dynamic deformation, the characteristic strain localization stages were identified by studying the temperature fields measured in-situ with a high-speed infrared camera CEDIP Silver 450M. The temperature values recorded in a strain localization zone do not support already existing concepts that the mechanism of strain localization is caused by thermoplastic instability. Our structural analysis shows evidence of a correlated behavior of the ensemble of defect, which can be classified as a structural transition that leads to strain localization. The results of experimental and structural studies allow us to suggest that one of the mechanisms of plastic strain localization in the AMg6 alloy tested under specified loading rates is caused by jumpwise processes in the defect structure of the alloy. © 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: dynamic loading, plastic strain localization, infrared thermography, structural studies © 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

* Corresponding author. Tel.: +7-342-237-8389; fax: +7-342-237-8487. E-mail address: sokovikov@icmm.ru * Corresponding author. Tel.: +7-342-237-8389; fax: +7-342-237-8487. E-mail address: sokovikov@icmm.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.2024.11.040