Experimental study of the distribution of alloying elements after the formation of epitaxial ferrite upon cooling in a low-carbon steel

The distributions of carbon and substitutional elements in a low-carbon steel during the formation of epitaxial ferrite on cooling after intercritical annealing have been studied by electron probe microanalysis (EPMA). The analysis has shown that the formation of epitaxial ferrite takes place with a...

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Bibliographic Details
Published in:Materials characterization 2010-10, Vol.61 (10), p.937-942
Main Authors: Santofimia, M.J., Kwakernaak, C., Sloof, W.G., Zhao, L., Sietsma, J.
Format: Article
Language:English
Subjects:
ANNEALING
AUSTENITE
CARBON
CARBON STEELS
COOLING
Cross-disciplinary physics: materials science
rheology
ELECTRON MICROPROBE ANALYSIS
Electron probe microanalysis
Epitaxial ferrite
EPITAXY
ETCHING
Exact sciences and technology
FERRITE
Low carbon steels
MATERIALS SCIENCE
Partitioning
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
PHASE TRANSFORMATIONS
Physics
SILICON
Solidification
SPATIAL DISTRIBUTION
Steels
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Summary:The distributions of carbon and substitutional elements in a low-carbon steel during the formation of epitaxial ferrite on cooling after intercritical annealing have been studied by electron probe microanalysis (EPMA). The analysis has shown that the formation of epitaxial ferrite takes place with a partial redistribution of alloying elements between the epitaxial ferrite and the austenite. This redistribution of alloying elements causes compositional gradients in the epitaxial ferrite that lead to a different etching behaviour with respect to the intercritical ferrite. Contrary to Thermo-Calc predictions, a distinct partitioning behaviour of silicon has been observed.
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2010.06.006