PSI - Issue 43

Maroš Eckert et al. / Procedia Structural Integrity 43 (2023) 318–323 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

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4. Conclusion The main goal of the paper is to analyze the behavior of 100MnCrW4 tool steel in hot deformation process and to apply a constitutive model for stress prediction depending on the true strain and strain rate. From the results, it can be stated that the constitutive model based on the Arrhenius equation and the Zener-Hollomon parameter is able to predict this stress with sufficient accuracy. The accuracy of the model is evaluated using the Pearson coefficient, which for all values of predicted voltages reaches the value R = 0.97885. The second parameter, which defines the accuracy of the MAPE model, is at the level of 17.28%, which means good model prediction. The largest deviations of the model from the real stress values are at a deformation temperature of 800 C and higher deformation rates, which defines the possible area of application of the model for the selected material. Acknowledgements This work was also supported by the Research Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic under the contract (ITMS2014+) no. 313011W442-CEDITEK II. References Alexander, J. M., 1989. Mapping Dynamic Material Behavior. Modelling Hot Deformation of Steels, Berlin, Springer, 101-114. Barlat, F., 2007. Advanced Methods in Material Forming. Constitutive Modelling for Metals, Berlin, Springer, 1-18. Pernis, R., Kasala, J., Bořuta, J., 2010 . High temperature plastic deformation of CuZn30 brass-calculation of the activation energy. Kovove Materialy, 48, 41-46. Zhou, P. W., Song, Y. R., Jiang, H. W., Wu, Y. C., Zong, Y. Y., 2022. Hot deformation behavior and processing maps of BG801 bearing steel. Journal of Materials Research and Technology, 18, 3725-3738. Spigarelli S., Cabibbo M., Eva ngelista E., Bidulská J., 2003. A study of the hot formability of an Al - Cu -Mg- Zr alloy. Jour. of Mat. Science, 38, 81 – 88 . Solhjoo, S., 2009. Analysis of flow stres sup to the peak at hot deformation. Mat. & Design. 30, 3036 - 3040. Jurči, P., 2009. Nástrojové ocele ledeburitického typu. Praha. CVUT 2009. p 221. ISBN 978 - 80 - 01 - 04439 - 1. Yang. J., Cao. B., Wu, Y., Gao. Z. Hu. R., 2019. Continuous cooling transformation (CCT) behavior of a high Nb - containing TiAl alloy. Materialia , 5, 100169 . Jurči, P, Janka, L. , 2012. Wear resistance of sub - zero processed Cr - V ledeburitic steel vanadis 6. 21st International Conference on Metallurgy and Materials. 2012, 635. Zener, C., Hollomon, J.H., 1944. Effect of Strain Rate Upon Plastic Flow of Steel. J. Appl. Phys., 15(1), 22 - 32 . Shang, X., Cui, Y., Fu, M. W., 2018. Aductile fracture model considering stress state and Zener - Hollomon parameter for hot deformation of metallic materials . International J ournal of Mechanical Science, 144, 800 - 812 . Lia, C., Huanga, L., Zhaoa, M., Zhanga, X., Lia, J., Lib, P., 2020. Influence of hot deformation on dynamic recrystallization behavior of 300M steel: Rules and modeling. Material Science Engineering A, p. 13992 5. Shang, X., Cui, Y., Fu, M.W., 2014. Aductile fracture model considering stress state and Zener - Hollomon parameter for hot deformation of metallic materials. International Jour nal of Mechanical Science, 144, 800 - 812. Krbata, M., Eckert, M., Krizam, D., Barenyi, I., Mikusova, I., 2019. Hot Deformation Process Analysis and Modelling of X153CrMoV12 Steel . Metals, 9(10), 1125.