BCC-superalloys: Perspectives and challenges

Knowles AJ, Zenk C (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Scripta Materialia Elsevier

Book Volume: 267

Article Number: 116761

DOI: 10.1016/j.scriptamat.2025.116761

Abstract

Body-centred-cubic BCC-superalloys are a nascent materials class following a microstructure template of a disordered BCC matrix (e.g. refractory metal, Fe, Ti) reinforced by coherent precipitates that adopt a BCC-derived ordered superlattice structure, to enable enhanced high temperature performance. This is by analogy to the highly successful Ni superalloys whose properties are underpinned by their microstructure template of γ/γ′ FCC-Ni solid solution and ordered Ni3Al. BCC-superalloys represent a powerful Beyond Nickel Based Superalloy design approach for high temperature applications from aerospace engines and rockets to fusion energy. Various BCC-superalloy base systems offer increased melting points, oxidation/corrosion/irradiation resistance, reduced density and/or cost advantages. However, challenges exist in phase stability, low temperature ductility, oxidation/corrosion resistance and the availability of predictive tools. This BCC-superalloys Viewpoint Set addresses key challenges, theories and opportunities across the following overarching topics: Modelling, Phase transformations, Lattice misfit, Mechanical behaviour, Deformation mechanisms, Oxidation/corrosion, and Additive manufacturing.

Authors with CRIS profile

Christopher Zenk Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM)

Involved external institutions

University of Birmingham GB United Kingdom (GB)

How to cite

APA:

Knowles, A.J., & Zenk, C. (2025). BCC-superalloys: Perspectives and challenges. Scripta Materialia, 267. https://doi.org/10.1016/j.scriptamat.2025.116761

MLA:

Knowles, Alexander J., and Christopher Zenk. "BCC-superalloys: Perspectives and challenges." Scripta Materialia 267 (2025).

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