Journal
MATERIALS TRANSACTIONS
Volume 49, Issue 11, Pages 2559-2565Publisher
JAPAN INST METALS
DOI: 10.2320/matertrans.MB200805
Keywords
phase-field method; dynamic recrystallization; microstructure; mechanical behavior; numerical scheme
Funding
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Aluminium Association
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A numerical model to simulate microstructure evolution and macroscopic mechanical behavior during hot working was developed. In this model, we employed a multi-phase-field model to Simulate the growth of dynamically recrystallized grains with high accuracy and the Kocks-Meehing model to calculate the evolution of dislocation density due to plastic deformation and dynamic recovery. Furthermore, an efficient computational algorithm was introduced to perform the multi-phase-field simulation efficiently. The accuracy of the developed model was confirmed by comparing the migration rate of grain boundaries with the theoretical value. Also, the numerical results for a polycrystalline material are compared with those obtained from a cellular automaton simulation. Furthermore, the effects of the initial grain size, grain boundary mobility and nucleation rate on the dynamic recrystallization behavior were investigated using the developed model. [doi: 10.2320/matertrans.MB200805]
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