Development and Improvement of Phenomenological Constitutive Models for Thermo-Mechanical Processing of 300M Ultra-High Strength Steel

• Published in: Journal of materials engineering and performance 2024, Vol.33 (2), p.1021-1033
• Main Authors: Sim, Kyong Ho, Kim, Li Sung, Han, Myong Jin, Chu, Ki Hyok, Li, Yong Ju, Li, Jong Hye
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Quality Control; Reliability; Safety and Risk; Technical Article; Tribology
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-023-08030-0

The hot deformation behavior of 300M ultra-high strength steel is investigated through isothermal uniaxial compression tests under various thermo-mechanical processing conditions of 900-1250 °C and 0.01-50 s −1 . Using the friction-corrected data of the experimental flow stress, the strain-compensated Arrhenius-type model, modified Johnson–Cook model and Khan–Huang–Liang model are developed. Based on the analysis of the reason of large deviation, the modified Johnson–Cook and Khan–Huang–Liang models are improved. The strain-compensated Arrhenius-type model exhibits the highest prediction accuracy. The determination coefficient and average absolute relative error of the strain-compensated Arrhenius-type model are 0.9971 and 3.57%, respectively. Meanwhile, the improved version of the modified Johnson–Cook model records the determination coefficient of 0.9964 and average absolute relative error of 3.59%, and the improved Khan–Huang–Liang model records 0.9949 and 5.08%. In view of the prediction accuracy and computation complexity, the improved versions of the modified Johnson–Cook and Khan–Huang–Liang models are preferred models. The improved phenomenological constitutive models enable us to predict the hot deformation behavior effectively for the optimization of the thermo-mechanical processing parameters of 300M ultra-high strength steel.