FIELD: measurement technology.SUBSTANCE: invention relates to the analysis the fracture or crack surface of a metal part of a turbomachine. Described is a method of analysing the fracture or crack surface of a metal part of a turbomachine, in which said surface corresponds to a plane of fracture or a cracking plane before opening in a laboratory for a cracked but not broken part, including at least one of the following steps: a) marking on the surface the position and the orientation of cleavage facets, so as to identify a region of fracture or crack initiation and to determine the direction of propagation of this fracture or crack, b) examining the surface and detecting the regions with the presence of equiaxed grains and/or lamellar grains, so as to evaluate the temperature at which the fracture or crack has taken place, and c) comparing the heat tinting(s) of the surface with those of samples from a heat tinting colour chart, said samples being made of the same material as the part and subjected to oxidisi
