In Situ TEM Observations of Deformation Processes in Nanocrystalline Pd

Harald Rösner; Gerhard Wilde

doi:10.4028/www.scientific.net/MSF.584-586.464

Paper Titles

Mechanical Properties and Microstructure Development of Ultrafine-Grained Cu Processed by ECAP
p.440

The Evolution of Homogeneity during Processing of Commercial Purity Aluminium by ECAP
p.446

Strength and Plasticity of Ultra-Fine Grained Zirconium at Low Temperatures
p.452

Influence of Severe Thermomechanical Treatment on Formation of Nanocrystalline Structure in Ni 718 and Ni 718Plus Alloys and their Mechanical Properties
p.458

In Situ TEM Observations of Deformation Processes in Nanocrystalline Pd
p.464

Mechanical Behavior and Stress-Induced Martensitic Transformation in Nanocrystalline Ti_49.4Ni_50.6 Alloy
p.470

Effect of Nanocrystalline Structure and Polygonized Dislocation Substructure on Ti-Ni Martensite Lattice Parameters and Transformation Lattice Strain
p.475

Effect of Processing Temperature on Microstructure Development during ECAP of Al-Mg-Sc Alloy
p.481

Effects of Equal-Channel Angular Pressing on the Anisotropy of Ultrafine Copper and Titanium
p.487

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In Situ TEM Observations of Deformation Processes in Nanocrystalline Pd

Abstract:

In this study we show that in-situ tensile tests performed in a transmission electron microscope (TEM) in combination with high-resolution TEM are feasible, and, that this method is appropriate to elucidate the deformation processes in nanocrystalline materials directly. First results on nanocrystalline Pd produced by repeated cold-rolling with intermediate folding of metal sheets are presented revealing that the material ruptured during the in-situ tensile tests along grain boundaries. Deformation twinning was observed in grains next to the crack indicating that the deformation processes must have originated from the grain boundaries.