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X-ray determination of the volume fraction of retained austenite in quenched carbon steels

A new method for x-ray determination of the volume fraction of phases in a sample has been developed. This method is characterized by the accurate and rapid determination of these phases by analysing a single reflection from each phase, regardless of the condition of the sample. This new method was applied to the determination of the quantity of retained austenite in some quenched carbon steels; it was found that the quantity of retained austenite increased with quenching temperature, becoming almost constant, and depended on the carbon content of the matrix and the quenching procedure.