Pistor J, Hagen S, Virtanen S, Körner C (2022)
Publication Type: Journal article
Publication year: 2022
Book Volume: 207
Article Number: 114301
DOI: 10.1016/j.scriptamat.2021.114301
Additive manufacturing by means of selective electron beam melting (SEBM) was recently demonstrated as an intriguing technique for the generation of single crystalline (SX) CMSX-4, a commercial Ni-base superalloy. The objective of this study is to compare the high-temperature oxidation resistance of SX SEBM-samples to their conventional counterparts which are derived by Bridgman investment casting. Therefore, time-resolved isothermal gravimetric analysis (TGA) was conducted at 850 and 1050 °C in synthetic air for 100 h. Due to solution annealing prior to oxidation, solidification induced elemental segregations could be homogenized completely in case of the SEBM-material, whereas they remained apparent for the conventional Bridgman samples. With residual elemental segregations inhomogeneous oxide scales emerged during exposure, exhibiting above-average scale thicknesses upon dendritic regions. Consequently, TGA revealed a higher mass gain in case of present segregations. In conclusion, a better high temperature oxidation resistance is observed for the homogeneous SEBM material.
APA:
Pistor, J., Hagen, S., Virtanen, S., & Körner, C. (2022). Influence of the microstructural homogeneity on the high-temperature oxidation behavior of a single crystalline Ni-base superalloy. Scripta Materialia, 207. https://doi.org/10.1016/j.scriptamat.2021.114301
MLA:
Pistor, Julian, et al. "Influence of the microstructural homogeneity on the high-temperature oxidation behavior of a single crystalline Ni-base superalloy." Scripta Materialia 207 (2022).
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