PSI - Issue 28

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 28 (2020) 1637–1643

© 2020 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 European Structural Integrity Society (ESIS) ExCo Abstract The behavior of the metal of welded joints and low-alloy low-carbon steel in the process of impact bending is studied from the point of view of energy partitioning due to crack growth process. It is shown that for metal with different microstructures there are significant differences in the degree of deformation before the formation of a brittle crack. The relationship between the work spent before the formation of a brittle crack and the overall work of fracture is shown. Statistical data confirming the increased susceptibility of the metal of welded joints to early formation of brittle cracks are presented. It is shown that the destruction of the metal of welded joints takes place with a large spent of energy on the final fracture of the specimen relative to the base metal. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Brittle fracture; Charpy impact test; Load-displacement curve 1. Introduction The reliability of a welded metal structure is determined by the reliability of the base metal from which it is made and the reliability of the metal of the welded joints. Destruction of metal structures often occurs due to the low reliability of metal welds Easterling (2013). A large number of different methods (Otani (1957), Hartbower and Orner (1963)) have been proposed to evaluate the material's resistance to brittle fracture under impact loading. The most commonly used method is the impact bending test Kantor and Bozhenov (2014). When evaluating the reliability of a material based on the results of impact bending tests, the most commonly evaluated indicators are the impact strength and the percentage of shear fracture area Shtremel’ (2014). The occurrence of a brittle fracture during impact bending tests indicates that the material is 1st Virtual European Conference on Fracture Features of weld metal brittle fracture in Charpy tests Sudin V.V. a * Kantor M.M. a Solntsev K.A. a a A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Science, Leninsky Ave. 49, Moscow 119334, Russia Abstract The behavior of the metal of welded joints and low-alloy low-carbon steel in the process of impact bending is studied from the point of view en rgy p rtitioning ue to cr ck growth process. It is shown that for metal with different m crostructur s there ar sig ificant differ ces in the degree of deformation before the formation f a brit le crack. The relationship between the work spent before the formation of a brittl crack and the ov rall work of fracture is shown. Statistical data confirming the increased susceptibility of the metal of we ded joints to early formation of brittle racks are presented. I is shown that the destruct on of the metal of welded joints t kes place with a large spent f energy on the final fracture of the specimen relative to the base metal. © 2020 Th Auth rs. Publi hed 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 u der re ponsibility of European Structural Integri y So i ty (ESIS) ExC K ywords: Brittle fracture; Charpy impact test; Load-displa ement curve 1. Introduction The reliability of a welded metal structure is determined by the reliability of the base metal from which it is made and the reliab lity of th metal of the welded joints. D struc ion of metal structure oft n occurs due to the low reliability of me al welds Eas erling (2013). A large nu ber of different methods (Otani (1957), Hartbower and Orner (1963)) have been proposed to evaluate the m terial's resistance to brittl fracture u der impact loading. The most commonly us d method is he imp ct bending test Kantor d B zhenov (2014). When evalu ting the reliability f a material based on the results of s, the most commonly evaluated indicators are impact strength nd the percentag of shear fracture area Shtr mel’ (2014). The occurrence of a brittle fracture during impact bending tests indi ates that the material is 1st Virtual European Conference on Fracture Features of weld metal brittle fracture in Charpy tests Sudin V.V. a * Kantor M.M. a Solntsev K.A. a a A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Science, Leninsky Ave. 49, Moscow 119334, Russia

* Corresponding author. Tel.: +74991357002. E-mail address: vsudyin@imet.ac.ru * Corresponding author. Tel.: +74991357002. E-mail address: vsudyin@imet.ac.ru

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 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 u der responsibility of t European Structural Integrity So i ty (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.135