Open Access
Misorientation mapping for visualization of plastic deformation via electron back-scattered diffraction.
Thomas M. Angeliu,Lisa M. Young,Michelle A. Othon,Luke N. Brewer +3 more
- Vol. 12, Iss: 1
TLDR
A method for the visualization of plastic deformation in electron back-scattered diffraction (EBSD) data has been developed and is described in this article based on mapping the intragrain misorientation in polycrystalline metals.Abstract:
The ability to map plastic deformation around high strain gradient microstructural features is central in studying phenomena such as fatigue and stress corrosion cracking. A method for the visualization of plastic deformation in electron back-scattered diffraction (EBSD) data has been developed and is described in this article. This technique is based on mapping the intragrain misorientation in polycrystalline metals. The algorithm maps the scalar misorientation between a local minimum misorientation reference pixel and every other pixel within an individual grain. A map around the corner of a Vickers indentation in 304 stainless steel was used as a test case. Several algorithms for EBSD mapping were then applied to the deformation distributions around air fatigue and stress corrosion cracks in 304 stainless steel. Using this technique, clear visualization of a deformation zone around high strain gradient microstructural features (crack tips, indentations, etc.) is possible with standard EBSD data.read more
Citations
More filters
Journal ArticleDOI
A review of strain analysis using electron backscatter diffraction.
TL;DR: This work reviews the current state of technology in terms of strain analysis using EBSD and the effects of both elastic and plastic strain on individual EBSD patterns will be considered.
Journal ArticleDOI
Investigation of the indentation size effect through the measurement of the geometrically necessary dislocations beneath small indents of different depths using EBSD tomography
TL;DR: In this article, the authors studied the link between the indentation size effect and the density of geometrically necessary dislocations (GNDs) through the following approach: four indents of different depth and hardness were placed in a Cu single crystal using a conical indenter with a spherical tip.
Journal ArticleDOI
Assessment of local deformation using EBSD: quantification of accuracy of measurement and definition of local gradient.
TL;DR: In this study, EBSD in conjunction with scanning electron microscopy was used to assess the magnitude of microstructural scale deformation (local deformation) for deformed Type 316 stainless steel and a parameter called the local gradient G(L) was proposed.
Journal ArticleDOI
Application of electron backscatter diffraction to the study of phase transformations
TL;DR: The application of the electron backscatter diffraction technique to the investigation of phase transformations is reviewed in this article, where a wide variety of results obtained using this technique are illustrated and discussed, focusing on thermodynamics and kinetics of phase transformation, solidification, solid state phase transformations, environmentally assisted reactions and thin film deposition.
References
More filters
Journal ArticleDOI
A review of strain analysis using electron backscatter diffraction.
TL;DR: This work reviews the current state of technology in terms of strain analysis using EBSD and the effects of both elastic and plastic strain on individual EBSD patterns will be considered.
Journal ArticleDOI
In situ measurement of grain rotation during deformation of polycrystals.
TL;DR: A universal method for providing data on the underlying structural dynamics at the grain and subgrain level based on diffraction with focused hard x-rays is presented.
Journal ArticleDOI
Investigation of the indentation size effect through the measurement of the geometrically necessary dislocations beneath small indents of different depths using EBSD tomography
TL;DR: In this article, the authors studied the link between the indentation size effect and the density of geometrically necessary dislocations (GNDs) through the following approach: four indents of different depth and hardness were placed in a Cu single crystal using a conical indenter with a spherical tip.
Journal ArticleDOI
Observations of lattice curvature near the interface of a deformed aluminium bicrystal
TL;DR: In this paper, a study of the pattern of lattice curvature near the interface of deformed high-purity aluminium (99.9999%) bicrystals of specified crystallographic character (large-angle random) is presented.
Journal ArticleDOI
Measurement of plastic strain of polycrystalline material by electron backscatter diffraction
TL;DR: In this paper, electron backscatter diffraction in conjunction with scanning electron microscopy is applied to measure the plastic strain imposed to stainless steel by tensile load, which is correlated with imposed plastic strain.