Tensile deformation behavior of twist grain boundaries in CoCrFeMnNi high entropy alloy bicrystals.

ABSTRACT: High entropy alloys (HEA) are a class of materials that consist of multiple elemental species in similar concentrations. The use of elements in far from dilute concentrations introduces a multi-dimensional composition design space by which the properties of metallic systems can be tailored. While the mechanical behavior of HEAs has been the subject of active research recently, the role of grain boundaries (GBs) in their deformation behavior remains poorly understood. Motivated by recent experiments on HEAs demonstrating that GBs act as nucleation sites for deformation twins, herein, we leverage atomistic simulations to construct a series of equiatomic CoCrFeMnNi HEA bicrystals with [Formula: see text] and [Formula: see text] symmetric twist GBs and examine their tensile behavior and underl

SUBMITTER: Lee H 

PROVIDER: S-EPMC7801446 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature