Abstract

There is significant anisotropic dilatation during bainitic transformation from plastically deformed austenite in a structurally and chemically homogenous alloy with no externally applied stress. The abnormal dilatation was found to be due to pronounced variant selection in a specific-textured austenite based on electron backscatter diffraction analysis and X-ray diffraction. A general rule of variant selection has been proposed, that the favored variants within an austenite grain usually belong to the same Bain group.

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