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

Pourabdollah, P ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1108/MMMS-12-2015-0078
  3. Publisher: Emerald Group Publishing Ltd
  4. Abstract:
  5. 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 upperbound 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
  6. Keywords:
  7. Finite element analysis ; Upper-bound solution ; Deformation ; Hot rolling ; Rolling ; Stainless steel ; Strain rate ; Stresses ; Temperature ; Temperature distribution ; Velocity ; Design/methodology/approach ; Rolling process ; Stainless steel AISI 304l ; Strain and strain rates ; Thermal finite element analysis ; Thermo-mechanical behaviors ; Two-dimensional finite element analysis ; Upper bound solution ; Finite element method
  8. Source: Multidiscipline Modeling in Materials and Structures ; Volume 12, Issue 3 , 2016 , Pages 514-533 ; 15736105 (ISSN)
  9. URL: http://www.emeraldinsight.com/doi/abs/10.1108/MMMS-12-2015-0078