PSI - Issue 47

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 47 (2023) 693–697

© 2023 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 the IGF27 chairpersons The experimental results and the data of numerical simulations conducted to analyze the microdefect accumulation kinetics suggest that one of the mechanisms of plastic strain localization in the materials studied under specified loading conditions is associated with the jumpwise processes taking place in the defective structure of the material. © 2023 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 the IGF27 chairpersons Keywords: Plastic shear localization, dynamic loading, numerical simulation, evolution of the defect structure, structural studies 27th International Conference on Fracture and Structural Integrity (IGF27) Plastic strain localization mechanism in AlMg alloys as a result of jumpwise processes in the defect structure of materials Mikhail Sokovikov a *, Sergey Uvarov a , Mikhail Simonov b Vladimir Oborin a , Vasiliy Chudinov 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 Dynamic tests were conducted on specimens subjected to loading in a split Hopkinson pressure bar. The temperature fields observed during the deformation process were visualized “in-situ” using a CEDIP Silver 450M high-speed infrared camera. Comparison between the temperature fields obtained experimentally and the results of simulations, which is based on the evaluation of the mesodefect accumulation kinetics showed satisfactory agreement to the accuracy of ~20%. The microstructural analysis performed using an electron microscope revealed the correlated behavior of the ensemble of defects, which can be classified as a structural transition that causes strain localization to occur in these ensembles.

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

2452-3216 © 2023 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 the IGF27 chairpersons

2452-3216 © 2023 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 the IGF27 chairpersons 10.1016/j.prostr.2023.07.051