Microscale spatial distribution of dislocations and long range internal stresses in cold worked bcc Fe

Autor(en)

Erhard Schafler, Michael Zehetbauer, Tamas Ungar, Sigrid Bernstorff, H Amenitsch

Abstrakt

By X-ray Bragg profile analysis dislocation densities, arrangements and long range internal stresses in cold worked polycrystalline iron were determined using synchrotron radiation. Room temperature torsionally deformed samples with different deformations have been investigated by scanning measurements across single grains with a focal spot of less than 50?m, in order to get information on the characteristics of the deformation induced substructure. At small deformations including stage III, the dislocation densities and internal stresses are uniform within single grains while at higher deformations in stages IV & V, the dislocation density and internal stresses exhibit correlated fluctuations. These fluctuations in stage IV are identified as polarized tilt walls (PTW) formed from polarized dipole walls (PDW), in analogy to Cu. Π2000 Trans Tech Publications.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Elettra Sincrotrone Trieste, Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Key Engineering Materials

Band

177-180

Seiten

159-164

Anzahl der Seiten

6

ISSN

1013-9826

DOI

https://doi.org/10.4028/www.scientific.net/KEM.177-180.159

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3abf5e47-9784-4bca-9886-071928ae7d1f