Atomistic simulation of grain boundary sliding in bicrystals of the CoNiCrFeMn alloy
Karkin I. N.1, Karkina L. E.1, Gornostyrev Yu. N.1
1M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
Email: lidiakarkina@gmail.com
The influence of grain-boundary segregations in the equiatomic high-entropy CoNiCrFeMn alloy (HEA) when annealing within the range of the moderate temperatures on grain boundary sliding is studied using atomistic simulation. It is shown that in the solid-solution state during grain boundary sliding the alloy behaves qualitatively similarly to a pure FCC metal. Formation of a segregation layer on the grain boundaries during annealing has a multidirectional effect on mechanisms of sliding along special grain boundaries of an inclination Σ 5. The influence of HEA annealing on stability of an ensemble of grain boundaries is discussed. Keywords: high-entropy alloys, segregations, grain boundaries, atomistic simulation, grain boundary sliding.
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