PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDir ct 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 33 (2021) 1013–1018

© 2021 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 scientific committee of the IGF ExCo Abstract In order to assess the influence of the geometry of the concentrators on the spatio-temporal inhomogeneities of the plastic flow of aluminum-magnesium alloys, uniaxial tension tests of axisymmetric specimens with ring concentrators of various geometries were carried out. The test program includes 4 groups of concentrators: a groove with a radius of 5 mm, a groove with an angle of 157 ° and a nose radius of 5 mm, a groove with an angle of 140 ° and a nose radius of 5 mm, and a groove with an angle of 140 ° and a nose radius of 5 mm. It is of interest to detect the effect of intermittent flow, which manifests itself in the form of load discontinuities in the loading diagram. An increase in the sharpness of the annular concentrator, and, consequently, an increase in the degree of stress concentration, leads to an increase in the bearing capacity of the samples (maximum perceived load), but deformation reserves decrease (maximum deformation at the time of destruction), and also affects the manifestation of the Portevin-Le Chatelier effect. © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: Jerky flow; the Portevin-Le Chatelier effect; digital image correlation; strain localization; aluminum-magnesium alloy. 1. Introduction Macroscopic localization of the plastic flow of solids and the processes of band formation lead to a significant decrease in the surface quality of the materials. This entails a significant decrease in ductility, strength and spontaneous IGF26 - 26th International Conference on Fracture and Structural Integrity Complex study of the Portevin-Le Chatelier effect by uniaxial tension of axisymmetric specimens with ring concentrators of various geometries Tatyana Tretyakova, Mikhail Tretyakov*, Evgenia Feklistova Center of Experimental Mechanics of Perm National Research Polytecnic University, 29, Komsomolskiy Ave., Perm, 614990, Russia Abstract In order to assess the influence of the geometry of the concentrators on the spatio-temporal inhomogeneities of the plastic flow of aluminum-magnesium alloys, uniaxial t nsion tests of axisymmetric specimens with ring concentrators of vari us geometries ere carried out. The test program includes 4 groups of c ncentrators: a groove with a radius of 5 mm, a gro ve with an angle of 157 ° and a n se radius of 5 mm, a groove with an angle of 140 ° and a nose radius of 5 mm, and a groove with an angle of 140 ° and a nose radius of 5 mm. It is of interest to detect the effect of intermitte t flow, which manifests itself in the form of load discontinuities in the loading diagram. An i cr ase in the sharpness f the annular concentrator, a d, consequently, an increase in the degree of stress c nce tration, leads to an incr ase in the bearing capacity of the samples (maximum perceived load), but deformation res rves decrease (maximum deformatio at the time of destruction), and also ffects the manifestation of the Portevin-Le Ch telier effect. © 2021 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 Statement: Peer-revi w under responsibility of th scientifi committee of the IGF ExCo Keywords: Jerky flow; the Portevin-Le Chatelier effect; digital image correlation; strain localization; aluminum-magnesium alloy. 1. Introduction Macroscopic localization of the plastic flow of solids and the processes of band formation lead to a significant decre se in the surface quality of t e m terials. This entail significant decrease in ductility, strength and spontaneous IGF26 - 26th International Conference on Fracture and Structural Integrity Complex study of the Portevin-Le Chatelier effect by uniaxial tension of axisymmetric specimens with ring concentrators of various geometries Tatyana Tretyakova, Mikhail Tretyakov*, Evgenia Feklistova Center of Experimental Mechanics of Perm National Research Polytecnic University, 29, Komsomolskiy Ave., Perm, 614990, Russia

* Tatyana Tretyakova. Tel.: +7-342-2198-732. E-mail address: cem.tretyakova@gmail.com * Tatyana Tretyakova. Tel.: +7-342-2198-732. E-mail address: cem.tretyakova@gmail.com

2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 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 scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.112