Journal article
Predicting microstructure evolution for friction stir extrusion using a cellular automaton method
Modelling and simulation in materials science and engineering, Vol.27(3), p.35006
03/06/2019
DOI: 10.1088/1361-651X/ab044b
Abstract
Friction stir extrusion (FSE) offers a solid-phase synthesis method consolidating discrete metal chips or powders into bulk material form. In this study, an FSE machine tool with a central hole is driven at high rotational speed into the metal chips contained in a chamber, mechanically stirs and consolidates the work material. The softened consolidated material is extruded through the center hole of the tool, during which material microstructure undergoes significant transformation due to the intensive thermomechanical loadings. Discontinuous dynamic recrystallization is found to have played as the primary mechanism for microstructure evolution of pure magnesium chips during the FSE process. The complex thermomechanical loading during the process drives the microstructure evolution. A three-dimensional finite element process model is developed using commercial software DEFORM 11.0 to predict the thermal field, mechanical deformation and material flow during the FSE process. Using the simulated thermomechanical loadings as input, a cellular automaton model is developed to simulate the dynamic evolution of the material grain microstructure. The predicted grain size is in good agreement with the experimentally measured grain size. This numerical study provides a powerful analysis tool to simulate the microstructure transformation for friction stir-based processes.
Details
- Title: Subtitle
- Predicting microstructure evolution for friction stir extrusion using a cellular automaton method
- Creators
- Reza Abdi Behnagh - Urmia University of TechnologyAvik Samanta - University of IowaMohsen Agha Mohammad Pour - Urmia University of TechnologyPeyman Esmailzadeh - Urmia University of TechnologyHongtao Ding - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Modelling and simulation in materials science and engineering, Vol.27(3), p.35006
- Publisher
- IOP Publishing
- DOI
- 10.1088/1361-651X/ab044b
- ISSN
- 0965-0393
- eISSN
- 1361-651X
- Number of pages
- 23
- Grant note
- 1537512 / Division of Civil, Mechanical and Manufacturing Innovation (https://doi.org/http://dx.doi.org/10.13039/100000147)
- Language
- English
- Date published
- 03/06/2019
- Academic Unit
- Iowa Technology Institute; Mechanical Engineering
- Record Identifier
- 9984196524202771
Metrics
14 Record Views