Elemental segregation to antiphase boundaries in a crept CoNi-based single crystal superalloy

Makineni SK, Lenz M, Neumeier S, Spiecker E, Raabe D, Gault B (2018)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Scripta Materialia Elsevier

Pages Range: 62-66

DOI: 10.1016/j.scriptamat.2018.07.042

Abstract

We report on the full three-dimensional compositional partitioning among the features of a planar imperfection comprising a superlattice intrinsic stacking fault (SISF) with its leading and trailing partials, as well as the antiphase boundary (APB) in the wake of the trailing partial formed in the L12-ordered γ′ phase of a CoNi-based single crystal superalloy. The partial dislocations and the APB are found to be Cr/Co rich relative to the surrounding γ′ and richer in W/Ta/Ti compared to the γ matrix phase. Solute diffusion mechanisms are derived from the compositional gradients in the vicinity of the imperfection.


Authors with CRIS profile

Malte Lenz Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

B03 (FP2): Einkristalline y'-gehärtete Co-Basis-Superlegierungen - Legierungsentwicklung, Gitterfehlpassung und mechanische Eigenschaften (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2016 - Dec. 31, 2019

Involved external institutions

Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research DE Germany (DE)

How to cite

APA:

Makineni, S.K., Lenz, M., Neumeier, S., Spiecker, E., Raabe, D., & Gault, B. (2018). Elemental segregation to antiphase boundaries in a crept CoNi-based single crystal superalloy. Scripta Materialia, 62-66. https://doi.org/10.1016/j.scriptamat.2018.07.042

MLA:

Makineni, Surendra Kumar, et al. "Elemental segregation to antiphase boundaries in a crept CoNi-based single crystal superalloy." Scripta Materialia (2018): 62-66.

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