Article
A Modified Johnson-Cook Model Incorporating the Effect of Grain Size on Flow Stress
AIST Technology Magazine
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.
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 - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2021 Association for Iron & Steel Technology (AIST), All rights reserved.
Publication Date
10-1-2021
Publication Date
Oct 2021
Disciplines
Citation Information
S. Ganguly, Mario F Buchely, K. Chandrashekhara, Simon Naumovich Lekakh, et al.. "A Modified Johnson-Cook Model Incorporating the Effect of Grain Size on Flow Stress" AIST Technology Magazine (2021) Available at: http://works.bepress.com/ronald-omalley/97/
This work was supported by the Peaslee Steel Manufacturing Research Center (PSMRC) at Missouri University of Science and Technology.
This article is available for download in Scholars' Mine.