TY  - SER
AU  - Vyrodova,Anna V.
AU  - Saraeva,Anastasia A.
AU  - Kireeva,Irina V.
AU  - Chumlyakov,Yuri I.
TI  - Mechanisms of plastic deformation of CoCrFeNi high-entropy alloy single crystals during solid solution hardening by Mo atoms
KW  - пластическая деформация
KW  - монокристаллы
KW  - высокоэнтропийные сплавы
KW  - статьи в журналах
N1  - Библиогр.: 9 назв
N2  - The effect of alloying with Mo atoms 4 at % on the temperature dependence of critical resolved shear stresses (CRSS) τcr(T), strain hardening coefficient, plasticity and deformation mechanism was studied on [1¯11]-oriented crystals of the fcc CoCrFeNi (at %) high-entropy alloy (HEA) within the temperature range T = 77-973 K under tension. It was shown that during solid solution hardening by Mo atoms, the CRSS τcr increased by 45 and 23 MPa, respectively, at 77 and 296 K compared to crystals of this orientation of the equiatomic CoCrFeNiMn HEA. The onset of plastic deformation is associated with slip, and a planar structure with dislocation pile-ups was found at T = 77-296 K. At 77 K, with the development of twinning in one system simultaneously with slip, high values of Θ = dσ/dϵ = 1750 MPa and maximum stresses before failure σmax = 1650 MPa were found, and the plasticity was 57%. With an increase in the test temperature, deformation developed only by slip; Θ = dσ/dϵ, and σmax decreased, but the plasticity remained at the level of 50-57%
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000997192
ER  -