Print Email Facebook Twitter Morphological and crystallographic anisotropy of severely deformed commercially pure aluminium by three-dimensional electron backscatter diffraction Title Morphological and crystallographic anisotropy of severely deformed commercially pure aluminium by three-dimensional electron backscatter diffraction Author Naghdy, Soroosh (Universiteit Gent) Pirgazi, Hadi (Universiteit Gent) Verleysen, Patricia (Universiteit Gent) Petrov, R.H. (TU Delft (OLD) MSE-3; Universiteit Gent) Kestens, L.A.I. (TU Delft (OLD) MSE-1; Universiteit Gent) Date 2017 Abstract International Union of Crystallography. The aim of this paper is to examine the morphological and crystallographic anisotropy that develops during high-pressure torsion (HPT) processing. Commercially pure aluminium was subjected to monotonic HPT deformation at room temperature. The microstructure and texture were studied by large-area electron backscatter diffraction (EBSD) scans. Three-dimensional EBSD scans served to s crutinize the morphological anisotropy and local texture. It was observed that two distinct stages of grain fragmentation and saturation occur during processing. Grains exhibited an ellipsoidal shape rather than an equi-axed one. The major axes of the ellipsoids showed a favorable orientation at the steady-state stage: an almost 20° inclination towards the shear direction. The global texture was characterized by typical shear components of face-centered cubic metals at both stages. However, the local texture revealed a preferential fragmentation pattern in the first stage: orientations in the vicinity of ideal fibers became less heavily fragmented while non-ideal orientations broke up more severely. This phenomenon was linked with the lattice rotation required to bring an initial orientation close to a stable one. Although the texture weakened considerably in the fragmentation stage, the texture index did not further decrease in the saturation stage. Saturation of texture, grain refinement and formation of microstructure are discussed in the light of different microstructural coarsening mechanisms.Morphological and crystallographic anisotropy of severely deformed commercially pure aluminium is studied by conventional and three-dimensional electron backscatter diffraction. Saturation of texture, grain refinement and the formation of microstructure are discussed in the light of different microstructural coarsening mechanisms. Subject aluminiumanisotropygrain fragmentationhigh-pressure torsion (HPT)three-dimensional electron backscatter diffraction (3D-EBSD) To reference this document use: http://resolver.tudelft.nl/uuid:bd806a31-bd2e-4b16-9a61-b6f37f9f6387 DOI https://doi.org/10.1107/S1600576717012754 ISSN 0021-8898 Source Journal of Applied Crystallography, 50 (5), 1512-1523 Part of collection Institutional Repository Document type journal article Rights © 2017 Soroosh Naghdy, Hadi Pirgazi, Patricia Verleysen, R.H. Petrov, L.A.I. Kestens Files PDF ks5563.pdf 2.79 MB Close viewer /islandora/object/uuid:bd806a31-bd2e-4b16-9a61-b6f37f9f6387/datastream/OBJ/view