Open Access

ARTICLE

Numerically and Experimentally Establishing Rheology Law for AISI 1045 Steel Based on Uniaxial Hot Compression Tests

Josef Walek^*, Petr Lichý

Department of Metallurgical Technologies, Faculty of Materials Science and Technology, VSB–Technical University of Ostrava, Ostrava, 70800, Czech Republic

* Corresponding Author: Josef Walek. Email:

(This article belongs to the Special Issue: Computer Aided Simulation in Metallurgy and Material Engineering)

Computer Modeling in Engineering & Sciences 2025, 142(3), 3135-3153. https://doi.org/10.32604/cmes.2025.059889

Received 19 October 2024; Accepted 02 February 2025; Issue published 03 March 2025

Abstract

Plastometric experiments, supplemented with numerical simulations using the finite element method (FEM), can be advantageously used to characterize the deformation behavior of metallic materials. The accuracy of such simulations predicting deformation behaviors of materials is, however, primarily affected by the applied rheology law. The presented study focuses on the characterization of the deformation behavior of AISI 1045 type carbon steel, widely used e.g., in automotive and power engineering, under extreme conditions (i.e., high temperatures, strain rates). The study consists of two main parts: experimentally analyzing the flow stress development of the steel under different thermomechanical conditions via uniaxial hot compression tests and establishing the rheology law via numerical simulations implementing the experimentally acquired flow stress curves. The numerical simulations then not only serve to establish the rheology law but also to verify the reliability of the selected experimental process. The results of the numerical simulations showed that the established rheology law characterizes the behavior of the investigated steel with sufficient accuracy also at high temperatures and/or strain rates, and can, therefore, be used for practical purposes. Last but not least, supplementary microstructure analyses performed for the samples subjected to the highest deformation temperature provided a deeper insight into the effects of the applied (extreme) thermomechanical conditions on the behavior of the investigated steel.

---

Keywords

---