Physical regularities of BCC/FCC bicrystal plastic deformation. A molecular dynamics study

Abstract

In the present work, the deformation behavior of bimetal specimens consisting of BCC and FCC grains is studied by the molecular dynamics method. The influence of crystallographic orientation of grains on uniaxial compression and tension is analyzed. The α‑iron grains interfacing with copper or nickel are investigated. The choice of FCC metals is governed by different levels of the specific stacking fault energy. The results obtained show that deformation of bicrystals can develop either in one or both grains. This is determined not only by the material and its strength properties, but also by the crystallographic anisotropy of these properties with respect to the loading direction.