Structural and phase transformations in aluminum-copper alloys under the effect of electroplastic deformation

Abstract

The deformational structure and the phase composition of binary and commercial aluminumcopper alloys produced using electroplastic deformation by rolling (EPDR) have been studied. It has been shown that structural transformation in the materials and changes in their hardness in the course of EPDR are governed by the initial state, which determines the distribution and the thermomechanical stability of a dislocation ensemble. It has been found that EPDR causes the dynamic deformation induced aging of the aluminum based supersaturated solid solution, which is accompanied by the precipitation of the strengthen ing θ phase in the Al-Cu alloy and the S phase in the D16 alloy.

Interaction of discrete breathers with primary lattice defects in bcc Fe

“…With respect to the technological applications of Fe as well as Fe-based alloys and steels, the above demonstrated and discussed breather-defect interactions should result in the modification of such important properties as ductility, creep, swelling, phase separation, electroplasticity, heterogamous segregation and others diffusion-limited processes responsible for degradation of mechanical properties under ageing and/or irradiation [24,26,27,[35][36][37].…”