WEB Additive Manufacturing of High Entropy AlloysWednesday (01.01.2020) 00:00 - 00:15 Part of:
Most of the papers published on HEA and CCA produced their material by the melting & casting route. Since the synthesis route is very complex and alloy fabrication very costly it appears that additive manufacturing (AM), which can reduce material costs solely by local application, is a suitable synthesis route for HEA and CCA utilization on an industrial scale. The present contribution demonstrates the potential of different kinds of AM (laser metal deposition, fused filament fabrication) to synthesize transition metal and refractory type HEAs and CCAs. One major objective is to explore how the synthesis route influence the structure and properties of CrMnFeCoNi in the as cladded and the heat treated condition. The comparison also involves not only different additive manufactured samples but samples syntesized by Investment casting, as well. Furthermore, it is shown that laser metal deposition is capable of generating crack free coatings of single phase bcc TiZrNbHfTa and two-phase AlxCrFeCoNiTiY possessing high chemical homogeneity without macroscopic segregations and exhibiting high hardness.