A mathematical model to compute the thermally affected zone at laser beam processing

The study of thermic affected zone assumes determination of radial temperature distribution for large processing periods. This approach deals with a method to determine the thermally affected zone dimensions (area of melted and solidified material), concerning the metals processing using a power laser beam assisted by an active gas jet (02). Spatially and temporally distribution of temperature inside the material is governed by the full temperature source, which has been modelled by taking into consideration the fact that the irradiation is made with a laser with "Gaussian distribution" of photons beam's intensity and oxidization energy. The results thus obtained allow determining the technological parameters of processing and the material constants. The theoretical results obtained by using the proposed method were confirmed by the experimental ones.