Structure of Triple Junctions of Grains, Nanoparticles in them and Bending - Torsion in Metal Nanopolycrystals

Nina Koneva; Eduard Kozlov; N.A. Popova; A.N. Zhdanov; M.V. Fedorischeva

doi:10.4028/www.scientific.net/MSF.584-586.269

Paper Titles

Bond Strength of Ultrafine Grained Zr Fabricated by Accumulative Roll Bonding
p.243

In Situ Tensile Testing of Ultra Fine Grained Pd and Pd-Ag Alloys
p.249

Applications of Differential Scanning Calorimetry on Materials Subjected by Severe Plastic Deformation
p.255

Texture Evolution of Magnesium Single Crystals Deformed by High-Pressure Torsion
p.263

Structure of Triple Junctions of Grains, Nanoparticles in them and Bending - Torsion in Metal Nanopolycrystals
p.269

Workability Limits of Commercial Purity Titanium Subjected to Equal Channel Angular Pressing
p.275

Specific Features of Static, Impact, and Fatigue Fracture of the 0.09%C-0.08%Mo-0.03%Nb-0.06%V Steel with Ultrafine-Grained Structure
p.281

Compressive Behavior of Ultrafine-Grained Mg-Zn-Y-Zr Alloy Containing Quasicrystalline Phase
p.287

Shear Induced Low- and High-Angle Boundary Characterization Using Kikuchi Bands in Transmission Electron Microscopy
p.293

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Structure of Triple Junctions of Grains, Nanoparticles in them and Bending - Torsion in Metal Nanopolycrystals

Abstract:

The paper presents the results of the transmission electron microscopic (TEM) investigation of the structure and phase composition of nanocrystalline copper obtained by the severe plastic deformation using the high pressure torsion (HPT) method. Special attention is paid to the triple junctions of grain boundaries. It was established that the triple junctions contained the partial disclinations and particles of the secondary phases. The dependences of such junction fractions on the deformation were measured of the formation at nanocrystalline copper. The phase analyses of the secondary phase structure were carried out, the sizes of the phase particles and their volume fractions were determined. The bending – torsion of the crystal lattice arising near the triple junctions was measured. The problem of the long – range stress field screening was considered.