@article{715efe40ea1e472e9f46fbcfbc185f4a,
title = "Ultrastrong Medium-Entropy Single-Phase Alloys Designed via Severe Lattice Distortion",
abstract = "Severe lattice distortion is a core effect in the design of multiprincipal element alloys with the aim to enhance yield strength, a key indicator in structural engineering. Yet, the yield strength values of medium- and high-entropy alloys investigated so far do not substantially exceed those of conventional alloys owing to the insufficient utilization of lattice distortion. Here it is shown that a simple VCoNi equiatomic medium-entropy alloy exhibits a near 1 GPa yield strength and good ductility, outperforming conventional solid-solution alloys. It is demonstrated that a wide fluctuation of the atomic bond distances in such alloys, i.e., severe lattice distortion, improves both yield stress and its sensitivity to grain size. In addition, the dislocation-mediated plasticity effectively enhances the strength–ductility relationship by generating nanosized dislocation substructures due to massive pinning. The results demonstrate that severe lattice distortion is a key property for identifying extra-strong materials for structural engineering applications.",
keywords = "ab initio calculation, atomic bond distances, lattice distortion, medium-entropy alloys, tensile properties",
author = "Sohn, {Seok Su} and {Kwiatkowski da Silva}, Alisson and Yuji Ikeda and Fritz K{\"o}rmann and Wenjun Lu and Choi, {Won Seok} and Baptiste Gault and Dirk Ponge and J{\"o}rg Neugebauer and Dierk Raabe",
note = "Funding Information: S.S.S. is grateful for the kind support of the Alexander von Humboldt Stiftung (AvH, Alexander von Humboldt Foundation, https://www.humboldt-foundation.de). Y.I. acknowledges the Grant-in-Aid for Scientific Research on Innovative Areas “Nano Informatics” (Grant No. 25106005) from the Japan Society for the Promotion of Science (JSPS), the Funding by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, through Elements Strategy Initiative for Structural Materials (ESISM) of Kyoto University, and the Grant-in-Aid for Young Scientist (B) of JSPS (Grant No. 16K18228). Y.I., F.K., and D.R. gratefully acknowledge funding from the Deutsche Forschungsgemeinschaft (SPP 2006). F.K. gratefully acknowledges NWO/ STW (VIDI Grant 15707). A.K.S. is grateful to the Brazilian National Research Council (Conselho Nacional de Pesquisas, CNPQ) for the PhD scholarship through the “Science without Borders” Project (203077/2014-8). Funding Information: S.S.S. is grateful for the kind support of the Alexander von Humboldt Stiftung (AvH, Alexander von Humboldt Foundation, https://www.humboldt-foundation.de). Y.I. acknowledges the Grant-in-Aid for Scientific Research on Innovative Areas ?Nano Informatics? (Grant No. 25106005) from the Japan Society for the Promotion of Science (JSPS), the Funding by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, through Elements Strategy Initiative for Structural Materials (ESISM) of Kyoto University, and the Grant-in-Aid for Young Scientist (B) of JSPS (Grant No. 16K18228). Y.I., F.K., and D.R. gratefully acknowledge funding from the Deutsche Forschungsgemeinschaft (SPP 2006). F.K. gratefully acknowledges NWO/ STW (VIDI Grant 15707). A.K.S. is grateful to the Brazilian National Research Council (Conselho Nacional de Pesquisas, CNPQ) for the PhD scholarship through the ?Science without Borders? Project (203077/2014-8). Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2019",
month = feb,
day = "22",
doi = "10.1002/adma.201807142",
language = "English",
volume = "31",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-VCH Verlag",
number = "8",
}