An upper-bound finite element solution for rolling of stainless steel 304L under warm and hot deformation conditions

Abstract

Purpose The purpose of this paper is to investigate the thermomechanical behavior of stainless steel AISI 304L during rolling at elevated temperatures. Design/methodology/approach Two-dimensional finite element analysis together with the upper-bound solution were used for predicting temperature field and required power in warm and hot rolling operations. The required power and heat of deformation were estimated employing an upper-bound solution based on cylindrical velocity field and at the same time, temperature distributions within the rolling steel and the work rolls were determined by means of a thermal finite element analysis. To consider the effect of flow stress and its dependence on temperature, strain and strain rate, a neural network model was used and combined with the thermal and mechanical models. Finally, the microstructure of rolled steel was studied and the effect of rolling conditions was justified employing the predictions. Findings The results have shown that the predicted temperature variations were in good agreement with the experiments. Moreover, the model was shown to be capable of determining the effects of various rolling parameters such as reduction and rolling speed with low-computational cost as well as reasonable accuracy. Originality/value A combined upper-bound finite element analysis was developed to predict the required power and temperature field during plate rolling while the model can be employed under both hot and warm rolling conditions.

Numerical Simulation as a Tool for the Study, Development, and Optimization of Rolling Processes: A Review

“…Pourabdollah and Serajzadeh [64] employed an upper-bound solution coupled with thermal FEM analysis to predict the thermomechanical behavior of an AISI 304L stainless steel strip under hot and warm rolling. A two-dimensional FEM model was used to forecast the temperature field inside the rolls.…”

“…Hot flat rolling is the process to which most attention is paid, as it has been simulated in nineteen of the twenty-five articles considered, varying the working temperature between 300 and 1460 °C, depending on the material studied. In second place are the cold rolling processes, studied in five articles, and, finally, there are the warm rolling processes, which are studied only in [64], working with stainless steel at a temperature of 600 °C. As far as the number of simulated passes is concerned, multipass simulations of between 2 and 15 passes have been studied in half of the articles discussed.…”

Finite element and generalized regression neural network modelling of multiple cracks growth under the influence of multiple crack parameters

“…The finite element (FE) method is one of the most popular numerical methods for crack-growth simulation and analysis owing to its robustness and flexibility. One can inquire into what-if scenarios in which a possible design space can be explored effectively (Paul, 2016; Pourabdollah and Serajzadeh, 2016). Moreover, experimental characterization and testing can be significantly reduced using what-if scenarios in FE simulations, which also explore the most economical design space.…”

Effect of Rolling Deformation on Nanograins and Mechanical Properties of Exceptional Nano/Microcrystalline 304 Stainless Steel

“…In this paper, nano/microcrystalline 304 stainless steel has been prepared by the aluminothermic reaction, which has the advantages of simplicity and low cost and can obtain large‐size ingots. The rolling process is a main route used to manufacture the finished and/or semi‐finished products . The grain size, volume fraction, and distribution of the nano\microcrystalline grains could be tailored by altering the rolling parameters .…”

“…The rolling process is a main route used to manufacture the finished and/or semi-finished products. [18] The grain size, volume fraction, and distribution of the nano\microcrystalline grains could be tailored by altering the rolling parameters. [15,19] The aim of this work is to study the effect of rolling deformation quantity on the nanostructure and tensile properties of exceptional nano/microcrystalline 304 stainless steel prepared by the aluminothermic reaction casting method, thereby determining the optimal rolling deformation needed to achieve excellent properties.…”