In-situ Observation Techniques of Solidification and Phase Transformation during Welding

摘要

In order to respond to request for the direct observation of microstructure formation during welding, "in-situ observation techniques " are outlined in the present paper. They include the high-temperature laser scanning confocal microscopy (LSCM), the in-situ SEM which consists of the microstraining system compatible with EBSD measurements, the in-situ SIM, the spatially resolved X-ray diffraction (SRXRD), the time-resolved X-rav diffraction (TRXRD) and the hybrid system with LSCM and TRXRD. They can be applied to the analysis of microstructural changes for improving control of weld properties. When combined with additional experiments and modelling, these techniques enable a deeper understanding of the kinetics of phase transformations.