2026-04-17T14:11:26Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4081412026-01-14T07:15:50Zcom_2072_1033col_2072_452950

Development of neural networks to study flow behavior of medium carbon microalloyed steel during hot forming Al Omar Mesnaoui, Anas Català Calderon, Pau Alcelay Larrión, José Ignacio Peña Pitarch, Esteve Àrees temàtiques de la UPC::Enginyeria mecànica::Fabricació Steel -- Thermal properties Artificial neural network Dynamic material model Processing maps Flow behavior Medium carbon microalloyed steel Acer -- Propietats tèrmiques In the present article, the application of an artificial neural network (ANN) model whose function is the development of plastic instability maps of a medium carbon microalloyed steel during the hot forming process is studied. Secondly, we proceed to create another ANN capable of providing the recrystallized grain size in the steady state resulting from forming deformation. We start from the experimental data of a medium carbon microalloyed steel obtained by hot compression tests with strain rates that vary between 10-4 s-1 and 3 s-1 and in a range of temperatures between 900 °C and 1150 °C. These experimental data are used to train the proposed ANN and obtain flow curves. Finally, the processing maps are developed by applying the dynamic materials model (DMM), according to which the safe hot forming domains and the plastic instability domains of the studied material are delineated. The comparison between the ANN and the experimental maps is carried out. It is ascertained that the optimal regions of forging in the ANN maps coincide with those obtained in the experimental maps. In addition, a study of the influence of the microstructure on the behavior of the studied steel during hot forming is carried out. This research was funded by CICYT (Spain), through the research competitive project under grant number PID2020-114819GB-I00. Peer Reviewed Postprint (published version) 2024-05-08 Article https://www.mdpi.com/2075-4701/14/5/554 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-114819GB-I00/ES/CAPACIDADES INTRINSECAS PARA ROBOTS CO-TRABAJADORES / http://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International Multidisciplinary Digital Publishing Institute (MDPI)