Formation of ultrafine grained structure in plain carbon steels through thermomechanical processing

Beladi, Hossein, Kelly, Georgina and Hodgson, Peter 2004, Formation of ultrafine grained structure in plain carbon steels through thermomechanical processing, Materials transactions, vol. 45, no. 7, pp. 2214-2218, doi: 10.2320/matertrans.45.2214.

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Title Formation of ultrafine grained structure in plain carbon steels through thermomechanical processing
Author(s) Beladi, HosseinORCID iD for Beladi, Hossein
Kelly, Georgina
Hodgson, Peter
Journal name Materials transactions
Volume number 45
Issue number 7
Start page 2214
End page 2218
Publisher Japan Institute of Metals
Place of publication Sendai, Japan
Publication date 2004
ISSN 1345-9678
Keyword(s) ultrafine ferrite
dynamic strain-induced transformation
plain carbon steels
thermomechanical processing
carbon content
Summary In the present study, wedge-shaped samples were used to determine the effect of nominal equivalent strain (between 0 and 1.2) and carbon content (0.06--0.35%C) on ferrite grain refinement through dynamic strain-induced transformation (DSIT) in plain carbon steels using single-pass rolling. The microstructural evolution of the transformation of austenite to ferrite has been evaluated through the thickness of the strip. The results showed a number of important microstructural features as a function of strain which could be classified into three regions; no DSIT region, DSIT region and the ultrafine ferrite (UFF) grain region. Also, the extent of these regions was strongly influenced by the carbon content. The UFF microstructure consisted of ultrafine, equiaxed ferrite grains (<2 μ$m) with very fine cementite particles. In the centre of the rolled strip, there was a conventional ferrite-pearlite microstructure, although ferrite grain refinement and the volume fraction of ferrite increased with an increase in the nominal equivalent strain.
Language eng
DOI 10.2320/matertrans.45.2214
Field of Research 091399 Mechanical Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2004, Japan Institute of Metals
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Document type: Journal Article
Collection: School of Engineering and Technology
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