Description:
<jats:p>Electron beam melting (EBM) is a relatively new rapid, additive manufacturing technology which can allow for the fabrication of complex, multi-functional metal or alloy monoliths by CAD-directed, selective melting of precursor powder beds. By altering the beam parameters and scan strategies, powder burn-through phenomena and uneven temperature field can be improved. In this paper the analyses for editable electron beam scanning track are presented based on the influence to the temperature field over the formation zone and the powder burn-through phenomena. The most promising strategy, non-uniform scanning mode for irregular scanning path, is approved by the ANSYS simulation and a two-dimensional scan experiment. The result shows non-uniform scanning mode can improve the uniformity of the temperature field and reduce the powder burn-through phenomena.</jats:p>