PSI - Issue 36

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

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Procedia Structural Integrity 36 (2022) 254–261

© 2022 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 conference Guest Editors Abstract For the butt joint model made from steel DC04 with dimensions: 600x600x10 mm, a non-stationary thermometallurgical problem, which takes into account phase transformations during submerged-arc welding of the butt joint by the moving welding arc and corresponds to the double ellipsoid welding heating source by J. Goldak, was solved by the means of the finite element method. Two technological welding schemes of the butt joint have been considered: a back-step welding with three 200 mm long sections, and a back-step welding with six 100 mm long sections. Based on the analysis of the results of the solved non-stationary thermometallurgical problem, obtained during heating and cooling, and in the residual state, for nodes located on the weld axis and in the longitudinal sections of the calculation model the kinetics of temperature and phase composition at different technological welding schemes has been established. Results of the study of phase proportion distribution in the weld and heat affected zone of the welded joint in the residual state are of important scientific and practical interest in terms of predicting the safe operation of the welded structures. © 2022 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 conference Guest Editors Keywords: butt welded joint, numerical simulation, kinetics of temperature and phase composition in the weld and heat-affected zone, back-step welding, technological welding schemes. 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Numerical simulation of the phase proportion distribution in a butt welded joint of steel DC04 for different back-step welding technological schemes Odarka Prokhorenko a, *, Serhii Hainutdinov a , Volodymyr Prokhorenko a , Cheslav Pulka b a Dept. of Welding Technology, Igor Sikorsky Kyiv Polytechnic Institute, Prosp.Peremohy 37, Kyiv 03056,Ukraine b Dept. of Engineering of Machine Building Techn logies, Tern pil Ivan Puluj National Technical University, Ruska 56, Ternopil 46001, Ukraine Abstract For the butt joint model made from steel DC04 with dimensions: 600x600x10 mm, a non-stationary thermometallurgical problem, which takes into account phase transformations uring submerged-arc welding of the bu t j i t by t ving welding a c and corresponds to he double ellipsoid welding heating source by J. Goldak, was solved by the means of the finite el ment metho . Two technol gical welding schemes of the butt joint have been consi ered: a back-step welding with thr e 200 mm lo g secti ns, and a back-step welding with six 100 mm long sections. Bas d on the analysis of the results of the solved non-stationary thermometallurgi al problem, obtained during heating and c oling, and i t residual stat , for nodes located on the weld axis and in the ongitudinal secti ns of the calculatio model the kinetics of t mperature and phas c mposition at different technological welding sch mes has been established. Results of the study phase proportion distributi n in the weld and h at affected zone of the weld d joint in the r idual state are of important scientific and prac cal inte est n terms of predicting the saf operation of the l structures. © 2022 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 conference Guest Editors Keywords: butt w lded joint, numerical simulation, kin tics of emperature and phase composition in the weld and heat-affected zone, back-step welding, technological weldi g scheme . 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Numerical simulation of the phase proportion distribution in a butt welded joint of steel DC04 for different back-step welding technological schemes Odarka Prokhorenko a, *, Serhii Hainutdinov a , Volodymyr Prokhorenko a , Cheslav Pulka b a Dept. of Welding Technology, Igor Sikorsky Kyiv Polytechnic Institute, Prosp.Peremohy 37, Kyiv 03056,Ukraine b Dept. of Engineering of Machine Building Technologies, Ternopil Ivan Puluj National Technical University, Ruska 56, Ternopil 46001, Ukraine

* Corresponding author. Tel.: +380-97-368-18-05. E-mail address: dariawelding@gmail.com * Corresponding author. Tel.: +380-97-368-18-05. E-mail ad ress: dariawelding@gmail.com

2452-3216 © 2022 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 conference Guest Editors 2452-3216 © 2022 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 re ponsibility of t conference Guest Editors

2452-3216 © 2022 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 conference Guest Editors 10.1016/j.prostr.2022.01.032