Projection of self-fluxing NiCrBSi alloys generates a complex microstructure composed by various low-symmetrical borides, carbides and silicides. Due to a weak signal to noise ratio, conventional XRD analysis is not sufficient to obtain reliable crystallographic data. In situ synchrotron XRD solidification experiments data are available for ternary nickel - chromium - silicon alloys and have provided useful information concerning the solidification sequence. However, similar studies are lacking for NiCrBSi alloys. Last, attempts to produce bulks by Selective Laser Melting revealed more complex and strongly refined microstructure poorly described by the literature, were phase identification by synchrotron XRD would be helpful. The two objectives of this study are: - Identify complex phases of NiCrBSi alloys obtained by both casting and Selective Laser Melting. - Determine equilibrium phases transformation sequence of NiCrBSi alloys by in situ XRD solidification experiment.