In situ time resolved X-ray diffraction using synchrotron

A new technique based on a combination of time resolved X-ray diffraction and laser scanning confocal microscopy was developed for direct observation of morphological evolution and simultaneous identification of phases during thermal cycle of welding. Time resolved X-ray diffraction data and laser scanning confocal microscopy images under the desired thermal cycles were measured simultaneously. As an example, the microstructural evolution in 15Cr-5Ni martensitic steel was observed to investigate the phase transformation kinetics under the thermal cycle of rapid heating and cooling.