Microstructure and Tensile Properties of Ferritic Lightweight Steel Produced by Twin-Roll Casting

Microstructure and Tensile Properties of Ferritic Lightweight Steel Produced by Twin-Roll Casting

Ferritic Fe–8Al–5Mn–0.1Nb–0.1C lightweight steel has been produced by twin-roll casting (TRC) process. The microstructures, in as-cast condition and during subsequent thermomechanical treatments, and tensile properties of the steel have been investigated and compared to those of the similar steel pr...

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Bibliographic Details
Published in:Metals and materials international Vol. 26; no. 1; pp. 75 - 82
Main Authors: Kwon, Yunik, Hwang, Ji Hyun, Choi, Hee Chae, Trang, T. T. T., Kim, Byoungkoo, Zargaran, A., Kim, Nack J.
Format: Journal Article
Language:English
Published: Seoul The Korean Institute of Metals and Materials 01-01-2020
Springer Nature B.V
대한금속·재료학회
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Coarsening
Engineering Thermodynamics
Ferritic stainless steels
Grain boundaries
Heat and Mass Transfer
Ingot casting
Iron and steel making
Lightweight
Machines
Magnetic Materials
Magnetism
Manufacturing
Materials Science
Metallic Materials
Microstructure
Niobium carbide
Nucleation
Processes
Recrystallization
Solid Mechanics
Steel industry
Tensile properties
Thermomechanical properties
Thermomechanical treatment
Twin roll casting
재료공학
Twin-roll casting
Lightweight steel
Ferrite
Grain refinement
κ-carbide
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Summary:Ferritic Fe–8Al–5Mn–0.1Nb–0.1C lightweight steel has been produced by twin-roll casting (TRC) process. The microstructures, in as-cast condition and during subsequent thermomechanical treatments, and tensile properties of the steel have been investigated and compared to those of the similar steel produced with conventional ingot casting (IC). TRC significantly refines the microstructure of the steel in as-cast condition, with a formation of NbC and κ-carbide particles within matrix and along grain boundaries. NbC particles inhibit the grain coarsening during subsequent homogenization treatment, while κ-carbide particles promote recrystallization during final annealing by particle-stimulated nucleation mechanism. Tensile properties of the TRC steel are comparable to those of the IC steel; however, such properties of the TRC steel have been achieved under a much smaller number of processing steps, making TRC as an ideal alternative for the production of ferritic lightweight steels. Graphic Abstract
Bibliography:https://link.springer.com/article/10.1007/s12540-019-00314-2
ISSN:1598-9623
2005-4149
DOI:10.1007/s12540-019-00314-2