High temperature oxidation of Ni-based superalloy 247 produced by electron beam powder bed fusion additive manufacturing
Source abstract
Abstract
This study investigates high temperature oxidation of Ni-base superalloy 247 processed by electron beam powder bed fusion (PBF-EB) compared with a conventionally cast (CC) counterpart. In terms of mass-gain during isothermal thermogravimetry at 1100 o C, the CC alloy outperformed the PBF-EB alloy. However, the PBF-EB alloy suffers from deeper internal oxidation due to its fine grain structure while shortening the transient oxidation stage. On the other hand, the CC alloy forms a non-homogeneous scale due to inhomogeneous distribution of bulky carbides and takes longer time to transition towards a steady-stage oxidation. The findings are analyzed and rationalized in the context of prior literature and thermodynamic-kinetic modeling.
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Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High-Temperature Coating Behaviors · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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