First Steps

Get in touch with EBSD data in MTEX

On this page ...
Import EBSD data
Correct EBSD data
Modelling Grains
Analyzing EBSD Data

Import EBSD data

Importing EBSD data can be done guided by the import wizard

import_wizard('EBSD')

or directly by the command loadEBSD

% specify file name
fname = fullfile(mtexDataPath,'EBSD','Forsterite.ctf');

ebsd = loadEBSD(fname,'convertEuler2SpatialReferenceFrame')
 
ebsd = EBSD  
 
 Phase  Orientations     Mineral        Color  Symmetry  Crystal reference frame
     0   58485 (24%)  notIndexed                                                
     1  152345 (62%)  Forsterite   light blue       mmm                         
     2   26058 (11%)   Enstatite  light green       mmm                         
     3   9064 (3.7%)    Diopside    light red     12/m1        X||a*, Y||b, Z||c
 
 Properties: bands, bc, bs, error, mad, x, y
 Scan unit : um
 

Correct EBSD data

The EBSD data are now represented by the variable ebsd. Which is essentially a long list of x and y values together with phase infotmation and orientations. To acces any of these properties do, e.g., the orientations of the Forsterite phase do

ebsd('Forsterite').orientations
 
ans = orientation  
  size: 152345 x 1
  crystal symmetry : Forsterite (mmm)
  specimen symmetry: 1
 
% EBSD data is stored in the class <EBSD_index.html EBSD> and in the latter
% the class <GrainSet_index.html grain> holds modelled grains.
% The following mindmap may induce an general idea analysing EBSD Data with
% MTEX.
%
% <<grain.png>>
%
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Modelling Grains

Grains are a basic concept for spatially indexed EBSD Data. With grain modelling comes up the possebility getting more information out of EBSD Data - e.g. fabric analysis, characterisation of misorientation

Analyzing EBSD Data

Visualizing EBSD Data is a central to understand a specimen. The most naive way is plotting of the individual orientations as pole point plots or spatially indexed in some map with colorcoded orientations. Moreover one gets with grains the possibility to take a closer look on grain boundaries.

Estimating ODFs from EBSD Data is of interest, furthermore selecting the optimal halfwidth is a difficult question, in particular in matters of grains.