The formation of ultrafine ferrite and low temperature bainite through thermomechanical processing

Beladi, H., Timokhina, I. B. and Hodgson, P. D. 2012, The formation of ultrafine ferrite and low temperature bainite through thermomechanical processing, Materials science forum, vol. 706-709, pp. 2047-2052.

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Title The formation of ultrafine ferrite and low temperature bainite through thermomechanical processing
Author(s) Beladi, H.ORCID iD for Beladi, H.
Timokhina, I. B.ORCID iD for Timokhina, I. B.
Hodgson, P. D.
Journal name Materials science forum
Volume number 706-709
Start page 2047
End page 2052
Total pages 6
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2012
ISSN 0255-5476
Keyword(s) ultra fine ferrite
warm deformation
low termperature bainite
thermomechanical processing
Summary In the current study, a novel approach was employed to produce a unique combination of ultrafine ferrite grains and low temperature bainite in a low carbon steel with a high hardenability. The thermomechanical route included warm deformation of supercooled austenite followed by reheating in the ferrite region and then cooling to bainitic transformation regime (i.e. 400-250°C). The resultant microstructure was ultrafine ferrite grains (i.e. <4μm) and very fine bainite consisting of bainitic ferrite laths with high dislocation density and retained austenite films. This microstructure offers a unique combination of ultimate tensile strength and elongation due to the presence of ductile fine ferrite grains and hard low temperature bainitic ferrite laths with retained austenite films. The microstructural characteristics of bainite were studied using optical microscopy in conjunction with scanning and transmission electron microscopy techniques.
Notes Presented at the 7th International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2011)
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861103 Basic Iron and Steel Products
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Trans Tech Publications
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Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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