TEST, EXPERIMENTAL DEVICE AND METHOD FOR CHARACTERIZING POWDER FOR ADDITIVE MANUFACTURE

摘要

Test tube, experimental device and characterization method for characterizing a powder suitable for use in an additive manufacturing process, the method comprising the steps of manufacturing on a tray (21b) two substantially identical test pieces (42) by additive manufacturing from of a powder to be characterized and containing non-solidified powder, measured on the first specimen resulting in the determination of parameters relating to the specimens (42), instrumentation of a measuring face (52) of the second specimen (42) to using at least one thermocouple, carrying out an experimental test including the projection of a high energy beam (31) on an exposure face (53) of the specimen (42) opposite to its face of measuring (52) and the acquisition of the temperatures measured by said at least one thermocouple over time, realization of numerical simulation models incorporating the relative parameters the probe (42) and the high power beam (31) and including at least one virtual thermocouple arranged in the same manner as said at least one thermocouple of the experimental test, each model being identical except for one parameter to be characterized relative to the powder forming an adjustment variable, and comparison of the experimental results with the results of the numerical simulations.