Modeling of Dynamic Recrystallization Behavior of As-Extruded AM50 Magnesium Alloy during Hot Compression by a Cellular Automaton Method

The dynamic recrystallization (DRX) behavior of as-extruded AM50 magnesium alloy was modelled and simulated by a cellular automaton (CA) method. Isothermal compression experiments were conducted, and the characteristic parameters in the CA model were obtained by the testing stress–strain flow curves...

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Bibliographic Details
Published in:Metals (Basel ) 2021-01, Vol.11 (1), p.75
Main Authors: Shu, Dayu, Wang, Jing, Jiang, Menghao, Chen, Gang, Lu, Liwei, Zhang, Hongming
Format: Article
Language:English
Subjects:
AM50 magnesium alloy
Cellular automata
cellular automaton
Compacting
Dynamic recrystallization
Grain boundaries
Grain growth
Grain size
Heat resistant alloys
High temperature
hot compression
Hot pressing
Magnesium alloys
Magnesium base alloys
Microstructure
microstructure evolution
Simulation
Strain rate
Variables
Yield strength
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Summary:The dynamic recrystallization (DRX) behavior of as-extruded AM50 magnesium alloy was modelled and simulated by a cellular automaton (CA) method. Isothermal compression experiments were conducted, and the characteristic parameters in the CA model were obtained by the testing stress–strain flow curves in a wide temperature range of 250–450 °C and strain rate range of 0.001–10 s−1. The flow stress, DRX volume fraction and DRX grain size of the as-extruded AM50 magnesium alloy were predicted by CA simulation. The results showed that the DRX behavior of the studied magnesium alloy was susceptive with the temperature and strain rate; meanwhile, the prediction results were approximate to the experimental values, indicating that the developed CA model can make a confident estimation on the DRX behavior of the as-extruded AM50 magnesium alloy in high temperature conditions.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11010075