Experimental and numerical analyses of microstructure evolution of Cu-Cr-Zr alloys during severe plastic deformation

https://doi.org/10.1016/j.matchar.2019.109849Get rights and content
Under a Creative Commons license
open access

Highlights

  • Presented model accurately predict the evolution of all of the microstructure parameters.

  • Deformational inhomogeneities play a substantial role both at macro- and microlevels.

  • Structure of grain boundary junction network could be critical for material design.

  • Fractions of HAGBs for Cu-0.1Cr-0.06Zr and Cu-0.3Cr-0.5Zr alloys almost coincide.

Abstract

The focus of researchers studying severe plastic deformation on the final grain size of material is often preventing them from observing a much wider spectrum of alterations to material defect structure. It can be asserted that the decrease in material grain size is, in fact, only the consequence of many different processes accompanying plastic deformation in metals. We have performed a constitutive experimental, FEM and discrete complex based studies for two copper alloys subjected to ECAP and MDF deformation processes. This combination of methods allows for recognising complementary microstructural effects, such as micro- and macro-localization phenomena, coupled dislocation cells and grains evolution, inhomogeneities of triple junction network and ultrafine grain emergence. In many cases, the obtained deformational inhomogeneities play a substantial role both for deformation at macro- and microscale levels. Heterogeneity of grain boundary junction network could be critical for design of nanostructured copper-based alloys suitable for electrical applications.

Keywords

Severe plastic deformation
Microstructural investigations
Continuous dynamic recrystallization
Triple junctions
Dislocations density
Numerical simulation
Grain boundary engineering

Cited by (0)