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Study on Dynamic Recrystallization in the Plastic Deformation Zone of Vibration Cast‐Rolling
Author(s) -
Sun Minghan,
Zhu Zhiwang,
Zheng Likang,
Zheng Chuanxing,
Du Fengshan
Publication year - 2019
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201900044
Subject(s) - recrystallization (geology) , vibration , materials science , dynamic recrystallization , nucleation , grain size , plasticity , deformation (meteorology) , metallurgy , structural engineering , composite material , microstructure , geology , hot working , engineering , acoustics , physics , paleontology , thermodynamics
In the comparative experiments of vibration and non‐vibration cast‐rolling, it is found that the vibration can significantly enhance the dynamic recrystallization effect in the plastic deformation stage during cast‐rolling. In order to explore the strengthening mechanism, the physical simulation experiment and the numerical simulation based on Yada model are used to study the plastic deformation stage of the cast‐rolling process. The research results show that the Yada model can accurately calculate the change history of grain size during vibration rolling. It is also found that the vibration frequency can promote the recrystallization nucleation by changing the equivalent plastic strain in the cast‐rolling strip during deformation, thereby effectively reducing the average grain size, whereas the amplitude only affects the start time of the dynamic recrystallization. In addition, it is found that vibration can effectively improve the uneven distribution of grain size on the cross section of cast‐rolling strip.