Examination of the Powder Spreading Effect in Electron Beam Melting (EBM)

Eschey, C.
Lutzmann, S.
Zaeh, M.F.
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University of Texas at Austin

In recent years, the scientific and industrial relevance of Electron Beam Melting (EBM) has grown. This is mainly due to the electron beam’s extensive power density and flexible positioning properties. Thus, considerable building rates as well as a favorable part quality can be realized. However, the appearance of transient physical effects constitutes a substantial drawback towards the broader use of the technology. Therefore, experimental examinations are being carried out in order to investigate the effect of sudden powder spreading during beam material interaction. Based on an existing mathematical model, an analytical approach is formulated in order to implement effective counter measures. Hence, a significant increase in process stability is being achieved as the undesirable powder spreading effect is being avoided securely.