3D microband boundary alignments and transitions in a cold rolled commercial purity aluminum alloy
Journal Article
·
· Materials Characterization
- Department of Engineering, Harvey Mudd College, Claremont, CA 91711 (United States)
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, 2052 (Australia)
In the study of microband formation during plastic deformation of face centered cubic metals and alloys, two theories have been proposed regarding the orientations of their boundaries: (i) they are aligned parallel to crystallographic planes associated with dislocation glide (i.e. (111) planes in FCC metals), or (ii) they are aligned in accordance with the macroscopic stress state generated during deformation. In this study, high resolution 3D electron backscatter diffraction (3D EBSD) was used to investigate the morphology and crystallographic nature of microband boundaries within a 19 × 9 × 8.6 μm volume of a deformed grain in commercial purity aluminum cold rolled to 22% reduction. It was found that microband boundaries correspond to both theories of orientation. Additionally, a single surface may contain both crystallographic and non-crystallographic alignments. Misorientations across boundaries in the regions of microband triple junctions have been identified for both boundary alignments. - Highlights: ► Reconstruction of a 3D volume of crystallographic orientations from EBSD data ► Subgrain features accurately reconstructed using specially designed strategies. ► Microband boundaries contain crystallographic and non-crystallographic alignments. ► Boundaries form by crystallographic process but rotate to non-crystallographic.
- OSTI ID:
- 22285041
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Vol. 79; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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