Analysis of the Mechanical Properties and Microstructure of a High-Silicon Dual-Phase Steels

H. K. D. H. Bhadeshia and D. V. Edmonds


The application of available two-phase deformation models to dual-phase steels is examined by testing them against available data published in the literature and an experimental high-silicon-containing steel. It is shown that the successful prediction of mechanical properties by the models depends critically on the strain distribution between the two phases of the steels examined. A detailed characterisation by transmission electron microscopy of the hard phases obtained in the high-silicon steel is also carried out. Hard phase structures consisting either of platelet martensite or of carbide-free upper bainite were identified, and both of these structures contained significant amounts of retained austenite.

Metal Science, Vol. 14, 1980, pp. 41-49.

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Bainitic Phase Transformations

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