Journal
MATERIALS TRANSACTIONS
Volume 46, Issue 3, Pages 581-586Publisher
JAPAN INST METALS
DOI: 10.2320/matertrans.46.581
Keywords
bainitic steels; phase transformation; reaustenitisation
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The formation of austenite during the heating of high-silicon steels with a microstructure of bainitic ferrite plates separated by carbonen-riched regions of retained austenite has been studied. As the steel is heated, retained austenite decomposes into a mixture of ferrite and carbides before a temperature is reached where it becomes the more stable phase and hence can grow. The decomposition makes it necessary for the austenite to nucleate from the mixture of ferrite and carbides. In this work, dilatometric analysis, transmission electron microscopy and X-ray diffraction have helped to identify the processes that take place during the heating experiment.
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