Deformation-Induced Effect of Phase Instability of Nanocrystalline Alloys

Formation of grain boundary segregations in alloy Fe-Cr-Ni during strong deformation and under radiation

“…The directed flows of point defects are not, probably, the only rea son for the occurrence of concentration irregularities in nanocrystalline alloys (see the discussion in [4][5][6][7]). Nevertheless, it is possible to assume that under cer tain conditions [1,2] the contribution of inverse Kirk endall effect to the formation of grain boundary segre gates is dominant.…”

“…The grain boundary segregates can play a deter mining role in the development of deformation induced phase instability of nanograined materials [1]. Under conditions of severe external action (radiation, plastic deformation) the formation of segregates that are significantly higher than those formed under equi librium conditions is often observed.…”

Kinetics of spinodal decomposition in driven nanocrystalline alloys

“…deformation [6] confirms this point of view. Though the question of physical mechanisms of the phase instability under intensive plastic deformation is still under discussions, there is no doubt that a thermodynamic factors [7] should be taken into account for explanation of decomposition phenomena in systems of freely miscible components or formation of new nonequilibrium phases [8].…”

“…In this paper we develop the model [7,8] taking into account the microscopic mechanism of interaction between GB and solute atoms. We generalize a lattice gas model for the inhomogeneous case where parameters of chemical bond are changed near GB.…”