MTEX 3.2 - 09/2011

3d EBSD Analysis

This release for the first time supports 3d EBSD data. In particular, MTEX is now able to

• import 3d EBSD data from stacked files
• visualize 3d EBSD data by plotting interactive slices through the specimen
• 3d grain detection
• topology of 3d grains, i.e. boundaries, neighbouring grains, etc.

Misorientation Analysis

• computation of the uncorrelated misorientation distribution (MDF) for one or two ODFs
• computation of the theoretical angle distribution of an ODF or MDF
• computation of the misorienation to mean for EBSD data

New Syntax for EBSD and grain variables

EBSD and grain variables can now be indexed by phase, region or grain ebsd variables. Let us assume we have a two phase ebsd variable containing 'Fe' and 'Mg' then can restrict our dataset to the Fe - phase only be writting

ebsd('Fe')

The same works with more than one phase as well as with grains and regions. As example consider the code

region = polygon('rectangle',0,0,100,200)

ebsd({'Fe','Mg'},region,some_grains)

which returns all EBSD measurements that have phase 'Fe' or 'Mg', are within the region with coordinates [0,0,100,200] and belong to the grains stored in the variable some_grains. Please have a look into the documentation for information how to index EBSD and grain variables.

Accordingly the following syntax is now depreciated.

 calcODF(ebsd,'phase',2)

Restrictions to the EBSD variable should not be given to the function but rather to the variable directly, i.e., the correct syntax is

 calcODF(ebsd('Fe'))

Other Enhangments

• better import and export of pole figures, ODFs and EBSD data. The coresponding commands has renamed to one single command called export
• automatic centering of a specimen with repsect to its specimen symmetry
• download and import tensors from http://www.materialproperties.org/
• new interfaces for Rigaku, Siemens, Bruker and many other X-ray devices and formats
• support for rank three tensors, i.e, for piezo electricity tensors
• improved documentation
• many bug fixes

MTEX 3.1 - 03/2011

Tensor Arithmetics This release introduces tensor analysis into MTEX, this includes

• import of tensors via the import wizard
• basic tensor operations: multiplication, rotation, inversion
• advanced visualization
• computation of avaraged tensors from EBSD data and ODFs
• computation of standard elasticity tensors like: Youngs modulus, linear compressibility, Cristoffel tensor, elastic wave velocities

Other Enhangments

• support for different crystal reference frame conventions
• automatic conversion between different reference frames
• definition of crystal directions in direct and reciprocal space
• more predefines orientations: Cube, CubeND22, CubeND45, CubeRD, Goss, Copper, SR, Brass, PLage, QLage, ...
• improved EBSD and grain plots
• new and improved interfaces
• many bug fixes

MTEX 3.0 - 08/2010

Crystal Geometry

This release features a completely redesigned crystal geometry engine which is thought to be much more intuitive and flexible. In particular, it introduces two new classes rotation and orientation which make it much more easier to work with crystal orientations. Resulting features are

• no more need for quaternions
• support for Bunge, Roe, Matthies, Kocks, and Canova Euler angle convention
• simple definition of fibres
• simple check whether two orientations are symmetrically equivalent

As a consequence of this rewrite, some functions are not available anymore and scripts written for MTEX 2.0 may not run with MTEX 3.0.

Other Enhangments

• automatic kernel selection in ODF estimation from EBSD data
• support for Bingham model ODFs
• esimation of Bingham parameters from EBSD data
• faster and more accurate EBSD simulation
• faster grain reconstruction
• improved documentation
• impoved output
• MTEX is now compatibel with NFFT 3.1.3

MTEX 2.0 - 10/2009

Grain Analysis for EBSD Data

MTEX is now able to partition spatial EBSD data into grains. This allows for the computation of various grain characteristics, as well as the computation and visualization of the grain boundaries and neighborhood relationships. Main features are:

• Grains statistics (area, diameter, mean orientation, ...)
• Missorientation analysis
• Interactive selection of grains by various criteria
• ODF-calculations for any subset of grains
• A large palette of plotting possibilities.

Visualization Improvements

• ODF fibre plot
• support for different x-axis alignment
• plot EBSD data with respect to arbitrary properties
• plot zero regions of ODFs and pole figures white
• pole figure contour plots
• color triangle for spatial EBSD plots

General Improvements

• ODF import / export
• rotate EBSD data
• Pole figure normalization
• improved interfaces and import wizard
• speed improvements

Incompatible Changes to Previous Versions

• The flags reduced and axial have been replaced by the flag antipodal

MTEX 1.2 - 05/2009

Improved EBSD import

• import weighted EBSD (e.g. from odf modeling)
• new HKL and Chanel interfaces (.ang and .ctf files)
• import of multiple phases
• import of arbitrary properties as MAD, detection error, etc.

Improved EBSD plotting

• plot EBSD data in axis angle and Rodrigues space
• annotations in these spaces
• plot arbitrary properties as MAD, detection error, etc.
• better orientation colorcoding
• superpose odf, pole figure and EBSD plots
• better interpolation

General Improvements

• suport for different crystal geometry setups
• faster and more accurate volume computation
• improved function modalorientation
• improved documentation

Incompatible Changes to Previous Versions

• The flag reduced has been replaced by the flag axial

MTEX 1.1 - 12/2008

Improved Import Wizard

• Load CIF files to specify crystal geometry
• Import EBSD data with coordinates
• More options to specify the alignment of the specimen coordinate system
• support for popla *.epf files, *.plf files, and *.nja files

Improved Pole Figure Analysis

• Background correction and defocussing
• Outlier detection and elimination

Improved EBSD Data Support

• Spatial plot of EBSD data
• Modify EBSD data in the same way as pole figures

Improved Plotting

• GUI to modify plots more easily
• Annotate orientations into pole figure plots
• Annotate orientations into ODF sections
• Coordinate systems for ODF and pole figure plots
• More flexible and consistent option system
• Default plotting options like FontSize, Margin, ...
• Speed improvements

Bug Fixes

• ModalOrientation works now much better
• Plot (0,0) coordinate in ODF plot at upper left
• Fixed a bug in ODF estimation from EBSD data

MTEX 1.0 - 06/2008

New Installer Including Binaries for Windows, Linux, and Max OSX

• MTEX ships now with an automated installer and binaries for Windows, Linux, and Mac OSX. This makes it in unnecessary to install any additional library and to compile the toolbox. (Thanks to F. Bachmann, C. Randau, and F. Wobbe)

New ODF Class

• The new function FourierODF provides an easy way to define ODFs via their Fourier coefficients. In particular MTEX allows now to calculate with those ODFs in the same manner as with any other ODFs.

New Interfaces

• New Polefigure interface for xrdml data (F. Bachmann)

Improved Plotting

• Plot EBSD data and continious ODFs into one plot
• Miller indeces and specimen directions can now be plotted directly into pole figures or inverse pole figures.
• New plotting option north, south for spherical plots
• Improved colorbar handling
• Spherical grids
• More spherical projections

Incompatible Changes With Previous Releases

• The flag hemisphere in S2Grid has been replaced by north, south, and reduced making it more consistent with the plotting routine.

Improved Documentation

MTEX comes now with over 500 help pages explaining the mathematical concepts, the philisophy behing MTEX and the syntax and usage of all 300 functions available in MTEX. Furthermore, you find numerous examples and tutorials on ODF estimation, data import, calculation of texture characteristics, ODF and pole figure plotting, etc.

Bug Fixes

• Fixed zero range method
• Fixed automatic ghost correction
• Fixed some loadPoleFigure issues
• Many other bug fixes.

MTEX 0.4 - 07/2008

Speed Improvments

• ODF reconstruction and PDF calculation is about 10 times faster now (thanks to the new NFFT 4.0 library)
• ODF plotting and the calculation of volume fractions, the texture index, the entropy and Fourier coefficients is about 100 times faster

New Support of EBSD Data Analysis

• Import EBSD data from arbitrary data formats.
• New class EBSD to store and manipulate with EBSD data.
• Plot pole figures and inverse pole figures from EBSD data.
• Recover ODFs from EBSD data via kernel density estimation.
• Estimate Fourier coefficients from EBSD data.
• Simulate EBSD data from ODFs.
• Export EBSD data.

New Functions

• fibrevolume calculates the volume fraction within a fibre.
• plotFourier plots the Fourier coefficients of an ODF.
• setcolorrange and the plotting option colorrange allow for consistent color coding for arbitrary plots.
• A colorbar can be added to any plots.
• mat2quat and quat2mat convert rotation matrices to quaternions and vice versa.

Incompatible Changes With Previous Releases

• New, more flexibel syntax for the generation of S2Grids
• Slightly changed syntax of unimodalODF and fibreODF.
• Default plotting options are set to {}, i.e. 'reduced' has to add manualy if desired
• Crystal symmetry triclinic is not called tricline anymore.

MTEX 0.3 - 10/2007

• new function fourier to calculate the Fouriercoefficents of an arbitrary ODF
• new option ghost correction in function calcODF
• new option zero range in function calcODF
• new function loadEBSD to import EBSD data
• simplified syntax for the import of diffraction data
• new importWizard for even more simple data import
• automatic detection of pole figure formats
• support of triclinic crystal symmetry with arbitrary angles between the axes
• default plotting options may now be specified in startup_mtex
• new plot option 3d for a three dimensional spherical plot of pole figures
• contour levels may be specified explicitely in all plot functions plotodf, plotpdf and plotipdf
• new plot option logarithmic
• many bugfixes

MTEX 0.2 - 07/2007

• new functions textureindex, entropy, volume
• creatly improved help
• improved installation
• new options for plotting routines for specific ODF sections
• many bugfixes

MTEX 0.1 - 04/2007

• initial release