Sympathetic nucleation of austenite in a Fe–22Cr–5Ni duplex stainless steel

In a Fe–22Cr–5Ni duplex stainless steel, δ-ferrite in a very high supersaturated solid solution state was found to promote the formation of the intragranularly nucleated austenite. Transmission electron microscopy revealed that, after the initial nucleation events for intragranularly nucleated auste...

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Bibliographic Details
Published in:Scripta materialia 2007-04, Vol.56 (8), p.673-676
Main Authors: Chen, C.Y., Yen, H.W., Yang, J.R.
Format: Article
Language:English
Subjects:
Austenite
Duplex stainless steels
Electron diffraction
Electron microscopy
Grains
Isothermal heat treatments
Nucleation
Orientation relationships
Solid solutions
Stainless steel
Steels
Sympathetic nucleation
TEM
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Summary:In a Fe–22Cr–5Ni duplex stainless steel, δ-ferrite in a very high supersaturated solid solution state was found to promote the formation of the intragranularly nucleated austenite. Transmission electron microscopy revealed that, after the initial nucleation events for intragranularly nucleated austenite, the subsequent small particle of austenite could form sympathetically at the broad face of the prior austenite grain. The orientation relationship between adjacent grains of sympathetically nucleated austenite has been investigated.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2006.12.021