Diffusion in Ultrafine Grained Materials

Sergiy V. Divinski; Gerhard Wilde

doi:10.4028/www.scientific.net/MSF.584-586.1012

Paper Titles

Corrosion Characteristics of an Ultrafine-Grained Al-Mg-Si Alloy (AA6082)
p.988

Microstructure and Corrosion Properties of Fine-Grained Mg-Based Alloys
p.994

Influence of HPT Deformation Temperature on Microstructures and Thermal Stability of Ultrafine-Grained Tungsten
p.1000

Control of Crystallographic Orientation and Grain Refinement in Bi₂Te₃-Based Thermoelectric Semiconductors by Applying High Pressure Torsion
p.1006

Diffusion in Ultrafine Grained Materials
p.1012

Finite Element Investigation of the Effect of Hardening Behavior of Alloys on Equal Channel Angular Pressing Performance
p.1021

A Triple-Scale Crystal Plasticity Simulation on Yield Behavior of Annealed FCC Fine-Grained Metals
p.1027

Formation of Multiply-Twinned Particles during Two-Nanoparticles Agglomeration: The Results of MD Simulation
p.1033

Long-Term Microhardness Evolution in Ti-Ni Shape Memory Alloys Processed by Severe Cold Rolling
p.1039

HomeMaterials Science ForumMaterials Science Forum Vols. 584-586Diffusion in Ultrafine Grained Materials

Diffusion in Ultrafine Grained Materials

Abstract:

The paper provides an overview of recent results of the radiotracer investigations of short-circuit diffusion in ultra fine grained (UFG) materials produced by severe plastic deformation (SPD). Different material classes (copper of different purity levels and Cu alloys) are considered. The study is focused on the existence of non-equilibrium grain boundaries after SPD. Although a dominant contribution of common high-angle grain boundaries with very similar diffusivities as those in the corresponding coarse-grained material is established, much faster diffusion rates are also observed experimentally. The nature and kinetic properties of these “high mobility” paths in different materials are investigated and critically discussed.