Selective dissolution of retained austenite in nanostructured bainitic steels

Kazum, Oluwole, Kannan, Mathan Bobby, Beladi, Hossein, Timokhina, Ilana, Hodgson, Peter and Khoddam, Shahin 2013, Selective dissolution of retained austenite in nanostructured bainitic steels, Advanced engineering materials, vol. 16, no. 4, pp. 442-444, doi: 10.1002/adem.201300287.

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Title Selective dissolution of retained austenite in nanostructured bainitic steels
Author(s) Kazum, Oluwole
Kannan, Mathan Bobby
Beladi, HosseinORCID iD for Beladi, Hossein
Timokhina, IlanaORCID iD for Timokhina, Ilana
Hodgson, Peter
Khoddam, Shahin
Journal name Advanced engineering materials
Volume number 16
Issue number 4
Start page 442
End page 444
Total pages 3
Publisher Wiley Blackwell
Place of publication London, England
Publication date 2013-04
ISSN 1438-1656
Summary Nanostructured bainitic steels, containing bainitic ferrite laths and retained austenite films, formed at two different isothermal temperatures were compared  for corrosion behavior in chloride-containing solution using electrochemical techniques. The potentiodynamic polarization results suggest that nanostructured bainite formed at 200 °C exhibits marginally higher corrosion resistance compared with that at 350 °C. Post-corrosion analysis of the galvanostatically polarized samples revealed localized corrosion for both the steels, but the degree of attack was higher in the 350 °C steel than in the 200 °C steel. The localized corrosion attack was due to selective dissolution of the retained austenite phase. The higher volume fraction and larger size of retained austenite in the 350 °C steel as compared to that of the 200 °C steel contributed to the pronounced corrosion attack in the 350 °C steel.
Language eng
DOI 10.1002/adem.201300287
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Wiley
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Document type: Journal Article
Collections: Institute for Frontier Materials
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