Microstructure and hardness evolution during isothermal process at 700 °C for Fe–24Mn–0.7Si–1.0Al TWIP steel

The microstructure and hardness evolution of Fe–24Mn–0.7Si–1.0Al TWIP steel during recrystallization were investigated by annealing the alloy at 700 °C for different time. The deformed structure is replaced by the equiaxed grains during recrystallization. The hardness decreased significantly in the...

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Bibliographic Details
Published in:Materials characterization 2010-12, Vol.61 (12), p.1356-1358
Main Authors: Liu, J.B., Liu, X.H., Liu, W., Zeng, Y.W., Shu, K.Y.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Microstructure
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Recrystallization
Solidification
TWIP steel
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Summary:The microstructure and hardness evolution of Fe–24Mn–0.7Si–1.0Al TWIP steel during recrystallization were investigated by annealing the alloy at 700 °C for different time. The deformed structure is replaced by the equiaxed grains during recrystallization. The hardness decreased significantly in the first 5 min period and then slowly. The disappearance of the dislocation and microtwins plays a much greater role than the grain coarsening on the decrease of hardness. ►The hardness decreases quickly at first and then slowly. ►The recrystallization is processed via a dislocation cell-coarsening mechanism. ►The disappearance of the dislocation and microtwins plays a greater role on the hardness decrease
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2010.09.007