MTEX Tutorial

Software Description

MTEX is a free Matlab toolbox for analyzing and modelling crystallographic structures by means of EBSD or pole figure data. This guide details the steps necessary to generate pole figures from Abaqus Crystal Plasticity simulation data. MTEX software can be downloaded from the product website[1].

Importing Data to MTEX Data is most easily imported to MTEX using the import wizard executable provided in the MTEX software package. After generating a text file of material texture data from crystal plasticity simulations, the import steps to MTEX are as follows:

1.Import Wizard – ODF Generic Interface

     a.Set ang1 to psi
     b.Set ang2 to theta
     c.Set ang3 to phi
     d.Set inpt to weight
     e.Change angle convention to Kocks (Psi, Theta, phi)
     i.Choose degree, active rotation for next two tabs
     f.Select Finish

2.Import Wizard – Import ODF

     a.Choose ODF tab
     b.Select texture file
     c.Next

3.Import Wizard - Crystal Reference Frame

     a.Mineral – Indexed
     b.Crystal Coordinate System
             i.Point Group: m-3m
     c.Next

4.Import Wizard – Specimen Reference Frame

     a.Choose specmine symmetry -1 triclinic
     b.Choose second plotting convention
     c.Next

5.Import Wizard – ODF Interpolation Method

     a.Set Halfwidth to 5
     b.Select ODF is given by accordingly distributed orientation option
     c.Next

6.Import Wizard – Import Data

     a.Ensure file name matches texture file selected in step 2
     b.Select import to script (m-file)
     c.Finish

7.In import script generated by Import Wizard

     a.Add line at end of file for plotting
             i.plotPDF(odf,Miller(#direction,#direction,#direction,CS))
            ii.#direction denotes direction of interest, i.e. 1, 0, …
     b.Run file to generate pole figure plot

Acknowledgements

Images courtesy of Zack McClelland, MS - Mississippi State University.