Investigation of the porosity of parts manufactured by electron beam melting using scanning photothermal radiometry

In the context of the non-destructive testing of pieces produced through additive manufacturing, this research focuses on investigating porosity using images obtained via scanning photothermal radiometry from Ti–6Al–4V samples. Variations in the material’s porosity as a function of the electron beam melting process parameters are revealed through photothermal images. The measured thermal signature is influenced by changes in the material’s apparent thermal diffusivity, which is affected by the presence of pores within the bulk material.