Lattice misfit design and characterisation in BCC superalloys

Ma K, Cheng S, Ma X, Blackburn T, Knowles AJ, An K, Santisteban J, Sun F, Zenk C, Ferreirós PA (2025)

Publication Language: English

Publication Type: Journal article

Publication year: 2025

Journal

Scripta Materialia Elsevier

Book Volume: 267

Article Number: 116802

DOI: 10.1016/j.scriptamat.2025.116802

Abstract

BCC superalloys are a promising class of high-temperature materials with a wide range of lattice misfit values, ranging from near-zero to ∼8 %. Analogous to nickel superalloys, lattice misfit combined with elastic anisotropy dictates precipitate morphology (spherical, cuboidal, plate/needle-like), coarsening kinetics, strengthening mechanisms, and microstructure evolution, making misfit control critical for tailoring microstructural stability and creep resistance. However, misfit characterisation, especially at high temperatures, is still in its infancy to establish its links with mechanical properties. This perspective emphasises three aspects of BCC superalloys: representative misfit-driven microstructures and temperature-dependent misfit evolution, state-of-the-art diffraction techniques for high-temperature misfit quantification, and machine learning frameworks to accelerate alloy design involving misfit. By consolidating diverse misfit data and advanced characterisation/modelling strategies, we outline strategies to bridge computational and experimental gaps, advocating for physics-informed models and high-throughput techniques to design next-generation BCC superalloys and motivate systematic studies on the misfit-property relationship in this nascent material class.

Authors with CRIS profile

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

Involved external institutions

Bariloche Atomic Centre / Centro Atómico Bariloche AR Argentina (AR) PSL Research University / Université de recherche Paris Sciences et Lettres FR France (FR) City University of Hong Kong (CityU) CN China (CN) Institut polytechnique de Paris (IP Paris) FR France (FR) Sun Yat-Sen University CN China (CN) University of Birmingham GB United Kingdom (GB) Oak Ridge National Laboratory US United States (USA) (US) VTT Technical Research Centre of Finland FI Finland (FI)

How to cite

APA:

Ma, K., Cheng, S., Ma, X., Blackburn, T., Knowles, A.J., An, K.,... Ferreirós, P.A. (2025). Lattice misfit design and characterisation in BCC superalloys. Scripta Materialia, 267. https://doi.org/10.1016/j.scriptamat.2025.116802

MLA:

Ma, Kan, et al. "Lattice misfit design and characterisation in BCC superalloys." Scripta Materialia 267 (2025).

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