Journal ArticleA 3D printable alloy designed for extreme environmentsSmith, Timothy M; Kantzos, Christopher A; Zarkevich, Nikolai A; Harder, Bryan J; Heczko, Milan; Gradl, Paul R; Thompson, Aaron C; Mills, Michael J; Gabb, Timothy P; Lawson, John WNANA<title>Abstract</title> <p>Multiprincipal-element alloys are an enabling class of materials owing to their impressive mechanical and oxidation-resistant properties, especially in extreme environments^1,2. Here we develop a new oxide-dispersion-strengthened NiCoCr-based alloy using a model-driven alloy design approach and laser-based additive manufacturing. This oxide-dispersion-strengthened alloy, called GRX-810, uses laser powder bed fusion to disperse nanoscale Y₂O₃particles throughout the microstructure without the use of resource-intensive processing steps such as mechanical or in situ alloying^3,4. We show the successful incorporation and dispersion of nanoscale oxides throughout the GRX-810 build volume via high-resolution characterization of its microstructure. The mechanical results of GRX-810 show a twofold improvement in strength, over 1,000-fold better creep performance and twofold improvement in oxidation resistance compared with the traditional polycrystalline wrought Ni-based alloys used extensively in additive manufacturing at 1,093 °C^5,6. The success of this alloy highlights how model-driven alloy designs can provide superior compositions using far fewer resources compared with the ‘trial-and-error’ methods of the past. These results showcase how future alloy development that leverages dispersion strengthening combined with additive manufacturing processing can accelerate the discovery of revolutionary materials.</p>Nature2023-05-1810543630Nature6177961513 to 5180028-0836https://doi.org/10.1038/s41586-023-05893-02323717National Science Foundation