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Simulation of austenite decomposition in continuous cooling conditions: a cellular automata-finite element modelling

Monshat, H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/03019233.2017.1405178
  3. Publisher: Taylor and Francis Ltd , 2019
  4. Abstract:
  5. Transformation of austenite to ferrite under continuous cooling condition was investigated. The heat conduction problem was managed by finite element method while two-dimensional cellular automata modeling was simultaneously performed to predict the progress of austenite decomposition using a two-step algorithm to reduce surface-to-volume ratio. Continuous cooling experiments on low carbon steel were made and the ferrite structure was determined and compared with the simulation data. The predicted and the experimental results demonstrated an acceptable consistency and the activation energy for ferrite growth was determined as 171 kJ/mole. The rate of ferrite transformation increased under examined continuous cooling conditions owing to higher nucleation rate. Moreover, the initial austenite grain size has shown a significant impact on the rate of transformation e.g. in air-cooled samples as the austenite grain size decreased from 24 to 34 µm, the mean ferrite grain size decreased about 8 µm. © 2017, © 2017 Institute of Materials, Minerals and Mining
  6. Keywords:
  7. Cellular automaton ; Finite element analysis ; Low-carbon steels ; Activation energy ; Austenite ; Cellular automata ; Cooling ; Ferrite ; Grain size and shape ; Heat conduction ; Low carbon steel ; Austenite decomposition ; Austenite grain size ; Cellular automata finite element ; Ferrite transformation ; Heat conduction problems ; Surface-to-volume ratio ; Two-dimensional cellular automata ; Two-step algorithms ; Finite element method
  8. Source: Ironmaking and Steelmaking ; Volume 46, Issue 6 , 2019 , Pages 513-521 ; 03019233 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/03019233.2017.1405178?journalCode=yirs20