PSI - Issue 30

ScienceDirect Available online at www.sciencedirect.com Sci nceD rect Structural Integrity Procedia 00 (2020) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2020) 000–000 Available online at www.sciencedirect.com

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

Procedia Structural Integrity 30 (2020) 53–58

© 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 EURASTRENCOLD - 2020 guest editors Abstract In this paper, the dynamics of strain fields in both austenitic stainless steel plate and its butt-welded joint under tensile loads was studied in situ by the digital image correlation methods. Stages of their stress–strain curves were determined, which correlated with the change in the distribution of the stain fields on the surface of samples. Based on their analysis, it was found that the presence of the weld in the sample center perpendicular to the applied uniaxial tensile load prevented the formation of the sample thinning. It was shown that the  strain-induced phase transformations, that occurred in the heat-affected zone and in the weld metal contributed to the existence of the yield point on the stress-strain curve, as well as the accumulation and dissipation of mechanical energy due to the rearrangement of the crystal lattice. © 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) IX Eurasian Symposium on the problems of strength and resource in low climatic temperatures (EURASTRENCOLD-2020) In Situ studies of the dynamics of strain fields in welded joints of austenitic stainless steel under tensile loads Kirill Kurgan*, Anatoliy Klopotov, Vasiliy Klimenov, Michael Slobodyan, Artem Ustinov, Yuriy Abzaev, Daria Ivanova National Research Tomsk Polytechnic University, 30 Lenin Prospectus, Tomsk, 634050, Russia Abstract In this paper, the dynamics of strain fields in both austenitic stainless steel plate and its butt-welded joint under tensile loads was studied in situ by the digital image correlation methods. Stages of their stress–strain curves wer determi ed, which c rrelated with the change in the distribution of the stai fi lds on the surface of sample . Based on thei analysis, it was found that he presenc of the weld in the sample center perpendicular to t e applied uniaxial tensile load prevented the formation f the s mpl thinni g. It was show at the  strain-induced phas transformations, that occurred in th heat-affected zone and in th weld metal contributed to the xistence of he yiel point on the stress-stra n curve, as well as the accumulation and dissipation of m chanic l energy due rearra g ment of the crystal lattice. © 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 EURASTRE COLD - 2020 guest editors Keywords: plastic deformation; digital correlation of image; austenite stainless steel; weld seam. 1. Introduction The study of the stress–strain states of metal in welded joints is the basis for assessing the total strength of welded ructures. The strength of th welded joint is determined by t di tribution of stresses at reas of t eir maximum conc ntration, where failure typically occurs. Data on the dynamics of stress fi lds in w lded joints IX Eurasian Symposium on the problems of strength and resource in low climatic temperatures (EURASTRENCOLD-2020) In Situ studies of the dynamics of strain fields in welded joints of austenitic stainless steel under tensile loads Kirill Kurgan*, Anatoliy Klopotov, Vasiliy Klimenov, Michael Slobodyan, Artem Ustinov, Yuriy Abzaev, Daria Ivanova National Research Tomsk Polytechnic University, 30 Lenin Prospectus, Tomsk, 634050, Russia Peer-review under responsibility of the EURASTRENCOLD - 2020 guest editors Keywords: plastic deformation; digital correlation of image; austenite stainless steel; weld seam. 1. Introduction The study of the stress–strain states of metal in welded joints is the basis for assessing the total strength of welded structures. The strength of the welded joint is determined by the distribution of stresses at areas of their maximum concentration, where failure typically occurs. Data on the dynamics of stress fields in welded joints

* Corresponding author. Tel.: +7-950-505-07-72. E-mail address: kurgan_ka@mail.ru * Corresponding author. Tel.: +7-950-505-07-72. E-mail address: kurgan_ka@mail.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 the responsibility of the EURASTRENCOLD - 2020 guest editors 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 the responsibility of the EURASTRENCOLD - 2020 guest editors

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 EURASTRENCOLD - 2020 guest editors 10.1016/j.prostr.2020.12.010