naa a22 4500 510814557 CHVBK 20180411083459.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1134/S0031918X13060057 doi (NATIONALLICENCE)springer-10.1134/S0031918X13060057 Specific features of cast high-entropy AlCrFeCoNiCu alloys produced by ultrarapid quenching from the melt [Elektronische Daten] [M. Ivchenko, V. Pushin, A. Uksusnikov, N. Wanderka, N. Kourov] Results of studying structural and phase transformations that occur in the cast high-entropy equiatomic AlCrFeCoNiCu alloy after ultrarapid quenching from the melt in an inert atmosphere (RQM) and various isothermal treatments are presented for the first time. The investigations have been performed using analytical, transmission and scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction structure and phase analyses, as well as measurements of the nanohardness, microhardness, and elastic moduli. It has been found that an ultrafine-grained structure is formed in this alloy during RQM. Already during quenching and, especially, during subsequent annealing, the alloy undergoes decomposition, which is accompanied by the precipitation in the bcc (B2) matrix of some nanosized phases, predominantly of equiaxed morphology, both atomically ordered (B2) and disordered (A2), with various chemical compositions. All nanophases are multicomponent solid solutions and are enriched in a few elements, which leads to a pronounced nanomodulation of the elemental and phase compositions over the alloy bulk, identified, in particular, from the presence of satellites in the vicinity of some reflections in selected-area electron diffraction patterns. Pleiades Publishing, Ltd., 2013 high-entropy equiatomic alloy nationallicence ultrarapid quenching nationallicence entropy of mixing nationallicence spinodal decomposition nationallicence structural and phase transformations nationallicence nanophases nationallicence chemical composition nationallicence Ivchenko M. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Pushin V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Uksusnikov A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Wanderka N. Helmholtz-Zentrum Berlin for Materials and Energy, Hahn-Meitner-Platz 1, 14109, Berlin, Germany aut Kourov N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/6(2013-06-01), 503-513 0031-918X 114:6<503 2013 114 11508 https://doi.org/10.1134/S0031918X13060057 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0031918X13060057 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ivchenko M. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Pushin V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Uksusnikov A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Wanderka N. Helmholtz-Zentrum Berlin for Materials and Energy, Hahn-Meitner-Platz 1, 14109, Berlin, Germany aut NATIONALLICENCE 700 1- Kourov N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 773 0- The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/6(2013-06-01), 503-513 0031-918X 114:6<503 2013 114 11508 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer