In situ observation of individual variant transformations in polycrystalline NiTi

The transformation behaviour of the individual texture components of NiTi rolled sheet was examined by synchrotron X-ray diffraction. The diffraction measurements performed in this study only captured a small fraction of orientation space, allowing the transformation of individual orientations to be studied. It was found that the individual B2 orientations transform at distinct points in the load plateau and that this can be correlated with the appearance of individual B19′B19′ variant orientations.