PSI - Issue 43

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

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Procedia Structural Integrity 43 (2023) 318–323

© 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 the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract Analysis of t high temperatur plastic behaviour of 10 MnCrW4 tool steel was developed in the temperature range of 800 – 1200 °C and the deforma i n rate in the range of 0.0 01 – 10 s -1 to the maximu value of the tr e strain 0.8. Microstruc ural changes were observed sing light optical microscopy (LOM). The effect of hot deformation temper ure on true tre s, peak stress and true strain was evaluated by mea s f he flo curves. Bas d on th se results, steel transformation was discussed from the dynamic recov ry and re rystallization poi t of view. Furthermo e, a present model, taki g into account the Zener-Hollomon par meter was applied to predict the true str ss an strain ove a wide range of temp r tures and st ain ra es. Based n the r sults, it can be stated that the proposed constitutive model suits our tool steel and can be applied to predict the behavior of the material during hot forming. © 20 23 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 1. Introduction This article deals with the analysis of h t deformati n of steel. Nowadays, with dvanced computer hardware nd software, it is pos ible to model material processing, pro uct production, operation, and lifetime up to failure. A major problem with these activities is obtaini g an adequate description f the mechanical and physical prop rties of the material t b rocessed. For this need in the field of hot forming, constitutive equations and models were cr ated on the basis of experimental and theoretical research work, which were able to describe the dependence between stress n strain at ifferent temperature nd strain rates on the basis of mpirical relationships, Alexander et al. (1989). In addition, modelling can be used as a research tool for a basic understanding of physical phenomena that can lead to 10th International Conference on Materials Structure and Micromechanics of Fracture Hot Deformation Analysis of 100MnCrW4 Tool Steel Maroš Eckert a , Michal Krbaťa a , Marcel Kohutiar a , Michal Kuba a* a Faculty of Special Technology, Alexander Dubcek University of Trenčín, Ku kyselke 469, 911 06 Trenčín, Slovakia Abstract Analysis of the high temperature plastic behaviour of 100MnCrW4 tool steel was developed in the temperature range of 800 – 1200 °C and the deformation rate in the range of 0.0 01 – 10 s -1 to the maximum value of the true strain 0.8. Microstructural changes were observed using light optical microscopy (LOM). The effect of hot deformation temperature on true stress, peak stress and true strain was evaluated by means of the flow curves. Based on these results, steel transformation was discussed from the dynamic recovery and recrystallization point of view. Furthermore, a present model, taking into account the Zener-Hollomon parameter was applied to predict the true stress and strain over a wide range of temperatures and strain rates. Based on the results, it can be stated that the proposed constitutive model suits our tool steel and can be applied to predict the behavior of the material during hot forming. 10th International Conference on Materials Structure and Micromechanics of Fracture Hot Deformation Analysis of 100MnCrW4 Tool Steel Maroš Eckert a , Michal Krbaťa a , Marcel Kohutiar a , Michal Kuba a* a Faculty of Special Technology, Alexander Dubcek University of Trenčín, Ku kyselke 469, 911 06 Trenčín, Slovakia Keywords: Hot Deformation; Tool Steel; Zener-Hollomon Parameter Keywords: Hot Deformation; Tool Steel; Zener-Hollomon Parameter 1. Introduction This article deals with the analysis of hot deformation of steel. Nowadays, with advanced computer hardware and software, it is possible to model material processing, product production, operation, and lifetime up to failure. A major problem with these activities is obtaining an adequate description of the mechanical and physical properties of the material to be processed. For this need in the field of hot forming, constitutive equations and models were created on the basis of experimental and theoretical research work, which were able to describe the dependence between stress and strain at different temperatures and strain rates on the basis of empirical relationships, Alexander et al. (1989). In addition, modelling can be used as a research tool for a basic understanding of physical phenomena that can lead to

* Corresponding author. Tel.: +421-32-7400-246 E-mail address: michal.kuba@tnuni.sk * Correspon ing author. Tel.: +421-32-7400-246 E-mail address: michal.kuba@tnuni.sk

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 the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

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 the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.278