Abstract
The mechanical properties of steel are influenced by grain size, which can change through mechanisms such as nucleation and growth at elevated temperatures. However, the classic Johnson-Cook model that is widely used in hot deformation simulations does not consider the effect of grain size on flow stress. In this study, the Johnson-Cook model was modified to incorporate the effects of austenite grain size on flow stress. A finite element model was employed to characterize the effects of grain size on the flow stress for different steel grades over a range of temperatures (900⁰ to 1300⁰). Simulation results show good agreement with experimental observations.
Recommended Citation
S. Ganguly et al., "A Modified Johnson-Cook Model Incorporating the Effect of Grain Size on Flow Stress," Proceedings of the AISTech 2020 (2020, Cleveland, OH), pp. 1614 - 1621, Association for Iron & Steel Technology (AIST), Sep 2020.
The definitive version is available at https://doi.org/10.33313/380/174
Meeting Name
AISTech 2020 (2020: Aug. 31-Sep. 3, Cleveland, OH)
Department(s)
Materials Science and Engineering
Second Department
Mechanical and Aerospace Engineering
Research Center/Lab(s)
Peaslee Steel Manufacturing Research Center
Second Research Center/Lab
Center for High Performance Computing Research
Keywords and Phrases
Johnson-Cook Model; Thermo-mechanical characterization; Prior-austenitic grain size; Finite-Element model
Document Type
Article - Conference proceedings
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2020 Association for Iron & Steel Technology (AIST), All rights reserved.
Publication Date
03 Sep 2020
Comments
This work was supported by the Peaslee Steel Manufacturing Research Center (PSMRC) at Missouri University of Science and Technology.