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- Title
Destruction of mesoscopic chemically modulated domains in single phase high entropy alloy via plastic deformation.
- Authors
Miyajima, Yoji; Nagata, Tomohiro; Takeda, Kohei; Yoshida, Shuhei; Yasuno, Satoshi; Watanabe, Chihiro; Kazuhiro, Ishikawa; Adachi, Hiroki; Tsuji, Nobuhiro
- Abstract
Chemically modulated mesoscopic domains in a fcc single phase CrMnFeCoNi equi-atomic high entropy alloy (HEA) are detected by small angle diffraction performed at a synchrotron radiation facility, whereas the mesoscopic domains cannot be detected by conventional X-ray diffraction and 2D mappings of energy dispersive X-ray spectroscopy by scanning electron microscopy and scanning transmission electron microscopy. The mesoscopic domains are deformed and shrieked, and finally destructed by plastic deformation, which is supported by the comprehensive observations/measurements, such as electrical resistivity, Vickers hardness, electron backscattering diffraction, and hard X-ray photoemission spectroscopy. The destruction of the mesoscopic domains causes the decrease in electrical resistivity via plastic deformation, so called K-effect, which is completely opposite to the normal trend of metals. We confirmed that the presence and the size of local chemical ordering or short-range order domains in the single phased HEA, and furthermore, Cr and Mn are related to form the domains.
- Subjects
ALLOY powders; SCANNING transmission electron microscopy; MATERIAL plasticity; X-ray scattering; ENERGY dispersive X-ray spectroscopy; ELECTRON backscattering; PHOTOELECTRON spectroscopy
- Publication
Scientific Reports, 2022, Vol 12, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-022-20932-y