Application of Forward Modelling and Dictionary Indexing to EBSD Orientation Data as a Means of Quantifying Dislocation Substructure Formation in FCC Metals

In the paper on a base of electron microscopy study a dynamic of evolution of dislocation substructures (DSS) arising on a stage large plastic deformation is examined. Microband dislocation substructure is a foundation of this consideration. Formation and evolution at deformation of this substructure for Cu-Al and Cu-Mn alloys are considered.

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X-Ray Microbeam Diffraction Studies of Large Strain Dislocation Substructure Formation in OFHC Copper

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.177-180.165 ◽

2000 ◽

Vol 177-180 ◽

pp. 165-170 ◽

Cited By ~ 2

Author(s):

G.C. Butler ◽

Stuart R. Stock ◽

David L. McDowell

Keyword(s):

Dislocation Substructure ◽

Large Strain ◽

Ofhc Copper ◽

X Ray ◽

Substructure Formation

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Choice of scalar measure for crystal curvature to image dislocation substructure in terms of discrete orientation data

Journal of the Mechanical Behavior of Materials ◽

10.1515/jmbm-2015-0016 ◽

2016 ◽

Vol 25 (1-2) ◽

pp. 15-22 ◽

Cited By ~ 2

Author(s):

Alexander Zisman

Keyword(s):

Free Surface ◽

Electron Backscatter Diffraction ◽

Dislocation Substructure ◽

Vector Form ◽

Orientation Data ◽

Ebsd Data ◽

Electron Backscatter ◽

Scalar Measure ◽

Ebsd Technique ◽

Backscatter Diffraction

AbstractStarting from Nye’s tensor, alternative characteristics of crystal curvature indicative of dislocation content are considered subject to very low thickness of investigated matter under the free surface and discreteness of orientation sampling. Analysis within the framework of continuum mechanics, undertaken to allow for such conditions peculiar to the electron backscatter diffraction (EBSD) technique, has shown the variable part of orientations expressed in a vector form to be most sensitive to lattice defects when projected to the free surface plane. Hence, as verified with EBSD data on a grain junction in a low deformed IF steel, magnitude of the projected field allows one to map plastic strains inhomogeneous within grains whereas divergence of this field distinctly images and quantifies low-angle dislocation boundaries formed at low strains.

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Formation of dislocation substructure and hardening mechanism in cyclic strain of FCC metals

Strength of Materials ◽

10.1007/bf01802434 ◽

1969 ◽

Vol 1 (5) ◽

pp. 509-514 ◽

Cited By ~ 1

Author(s):

K. S. Chernyavskii

Keyword(s):

Dislocation Substructure ◽

Cyclic Strain ◽

Hardening Mechanism ◽

Fcc Metals

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Study of the True Nature of Microband Boundaries in Aluminum with 3D EBSD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.702-703.558 ◽

2011 ◽

Vol 702-703 ◽

pp. 558-561 ◽

Cited By ~ 1

Author(s):

Lori Bassman ◽

Cassandra George ◽

M. Zakaria Quadir ◽

Nasima Afrin ◽

Ben Yue Liu ◽

...

Keyword(s):

Plastic Deformation ◽

Stress State ◽

Crystallographic Orientation ◽

Commercial Purity ◽

Local Surface ◽

True Nature ◽

Orientation Data ◽

Fcc Metals ◽

Commercial Purity Aluminum ◽

Crystallographic Planes

There are two opposing theories regarding the nature of aligned dislocation boundaries generated during plastic deformation of FCC metals: (i) they are oriented along crystallographic planes, and (ii) their alignment is dictated by the macroscopic stress state during plastic deformation. 3D crystallographic orientation data were collected on a volume containing microbands in commercial purity aluminum, and 3D boundaries were reconstructed. Both types of alignment were found in local surface features.

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