Description

It allows to simulate a single or multigradient EBSD map with a free choice of the starting orientation, size, misorientation axis, direction of misorientation increase, type and range of noise. Multiple gradients can be superposed and you can use an existing map and add noise or deform it.

Not implemented yet:

* the features singleJump, multiKnob, polyGrain
* a more flexible noise distribution
* starting from a different position
* fixing the first column of pixels

Syntax

ebsdSIM = simulateEBSD

Initialize the object.

ebsdSIM.xdim = 50
ebsdSIM.ydim = 50

Set the dimension (optional).

ebsdSIM.ori0 = orientation.byEuler([0, pi, 30]*degree,ebsdSIM.CS)

Change the initial orientation (optional).

ebsdSIM.makeMap
plot(ebsdSIM.EBSDsim)

Make a planar map.

ebsdSIM.axS = vector3d(1,1,0)

1) create a simple gradient. 1a) set the misorientation axis.

ebsdSIM.gradDir = vector3d(1,0,0);

1b) set the direction towards which the misorientation increases.

ebsdSIM.addFeature_simpleGradient

1c) create the gradient.

ebsdSIM.noiseFun = 'logn'

2) add noise. 2a) specify noise type: 'uniform' or 'logn'.

ebsdSIM.noiseMax = 0.1*degree;

2b) specify maximum noise.

ebsdSIM.addnoise

2c) create noise.

ebsdSIM.axS = vector3d(1,1,1)

3) add a circular "subgrain". 3a) set the misorientation axis.

ebsdSIM.addFeature_circularSubgrain

3b) add "subgrain".

ebsd = ebsdSIM.EBSDsim;
plot(ebsd,angle(ebsd.orientations,ebsd.orientations(1))/degree)
nextAxis
ebsd = ebsd.gridify
plot(ebsd,ebsd.gradientX.norm)
nextAxis
plot(ebsd,ebsd.gradientY.norm)
nextAxis
sax = axis(ebsd(1).orientations,ebsd.orientations)
ck= HSVDirectionKey(specimenSymmetry('1'))
plot(ebsd,ck.direction2color(sax))
nextAxis
plot(ck)

Inspect the result.

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/simulateEBSD.simulateEBSD.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX

@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.