Deformation behavior of perfect and imperfect nanomaterials made of intermetallic compounds with bcc lattice

Abstract

The paper reviews the literature devoted to the stress-strain behavior of nanomaterials made of NiAl and FeAl intermetallics having B2 superstructure with body-centered cubic (bcc) lattice. Such nanomaterials demonstrate elastic deformation up to the point of their failure. In a concave region of a strain dependence of the potential energies P(ε), the materials demonstrate thermodynamic instability and the non-homogeneous elastic deformation which is accompanied by the appearance of domains of two strain levels. Stretching behavior of NiAl and FeAl nanomaterials depends on lattice defects and sample geometry. An introduction of lattice defects which result in an appearance of residual stresses in structures can lead to the nanomaterial strengthening.