Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 3: Topical Session Bulk Nanostrucured Materials I - Processing
MM 3.2: Vortrag
Montag, 26. März 2012, 10:45–11:00, H 0107
The influence of total strain and deformation rate during the ECAP process on the microstructure, microhardness and kinetic properties of nickel — •Gerrit Reglitz1, Sergiy Divinski1, Harald Rösner1, Vladimir Popov2, Evgeniy Shorokhov3, and Gerhard Wilde1 — 1Institute of Materials Physics, University of Münster, Münster, Germany — 2Institute of Metal Physics, Russian Academy of Sciences, Ekaterinburg, Russia — 3All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia
In the last years ultra-fine grained (UFG) materials produced by severe plastic deformation like equal channel angular pressing (ECAP) or high-pressure torsion became an intensive research topic due to the improved properties which these highly deformed materials offer.
By ECAP it is possible to produce materials with different microstructures through changing the process parameters such as the total introduced strain, the deformation rate or the deformation temperature. In this work the total strain was varied by using different numbers of ECAP passes between 2 and 12, while the deformation rate was varied from 10−2 s−1 (standard ECAP) to 104 s−1 (explosive ECAP). The microstructure, microhardness and the kinetic properties of grain boundaries in the different materials are investigated and comparatively discussed.
Support by DFG is gratefully acknowledged.