Journal
SCRIPTA MATERIALIA
Volume 120, Issue -, Pages 85-89Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.04.014
Keywords
Multi-principal-element alloy; Alloy design; Cluster-plus-glue-atom model; Coherent precipitation; Mechanical properties
Categories
Funding
- National Natural Science Foundations of China [51171035, 11174044, 51131002]
- International Science & Technology Cooperation Program of China [2015DFR60370]
- US Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory [DE-FE-0008855, DE-FE-0011194, DE-FE-0024054]
- US Army Research Office Project [W911NF-13-1-0438]
- US National Science Foundation [CMMI-1100080]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1100080] Funding Source: National Science Foundation
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The present work reports a cuboidal B2-coherently-enhanced body-centered-cubic (BCC) alloy Al0.7CoCrFe2Ni with prominent tensile properties at both room (ultimate tensile strength sigma(b) = 1223 MPa and elongation to fracture delta = 7.9%) and high temperatures. This multi-principal-element alloy is developed out of a cluster formula [Al-M-14]Al-1 issued from the cluster-plus-glue-atom model of a BCC structure. Here, the [Al-M-14] cluster is centered by Al, surrounded by fourteen average atoms M = Co1/2Cr1/5Fe2/5Ni1/5, and glued with one Al atom. Its excellent mechanical properties are attributed to a superalloy-like microstructure, characterized by cuboidal B2 nanoprecipitates coherently embedded in the BCC matrix. (C) 2016 Elsevier Ltd. All rights reserved.
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