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Dr. Ralf Hielscher
MTEX Workshop 2021

# Chemnitz MTEX Workshop 2021

Every registered participant should have received a password in order to see the course materials.

## Learning Crystallographic Texture Analysis with MTEX

The workshop extends over two weeks and is part of the Master Course Introduction into the crystallographic texture analysis and counts for 4 ETCS points. While the first week is mainly devoted to beginners in MTEX and/or texture analysis the second week is a meeting of MTEX users with different experiences to share specific use cases, tips and tricks and discuss recent and upcoming developments in MTEX.

### Week 1: 08.03.2021 - 12.03.2021

During the first week we provide on a daily basis two morning lectures covering the basic theoretical principles of crystallography, diffraction and texture analysis. During the two afternoon exercises the theoretical concepts will be demonstrated at practical examples within MTEX.

Lecture 1 - General Concepts: free video,
Matlab basics and general concepts of MTEX the class vector3d, spherical coordinates

Lecture 2 - Crystal Lattice:
crystal lattice, direct and reciprocal coordinate system, Miller indices, zonal axes, crystal shapes

Lecture 3 - Rotations and Crystal Symmetries:
rotation representations, Euler angles, Rodrigues vectors, visualizations, fibers, crystal symmetries, point groups, Laue groups, space groups, fundamental sectors

Exercise 1:

Lecture 4 - Orientations:
symmetrically equivalent orientations, pole figures, inverse pole figures, visualizations, parameterization

Lecture 5 - Density Functions:
kernel density estimation, orientation density function, pole density function, inverse pole density function, model ODFs, ODF characteristics, random sampling

Lecture 6 - ODF Reconstruction from Pole Figure Data:
X-ray, neutron and synchrotron diffraction, data import, ghost correction, ODF estimation

Exercise 2:

Lecture 7 - EBSD:
data import, pole figures, inverse pole figures, color keys, reference frame, properties

Lecture 8 - Grains:
grain reconstruction, shape properties, orientation properties

Exercise 3 - EBSD:

Exercise 4 - Grains:

Lecture 9 - Misorientations:
definition, visualization, phase transitions, misorientation axis, misorientation angle distribution, KAM, GOS

Lecture 10 - Grain Boundaries:
geometric properties, visualization, smoothing, tilt vs. twist boundaries, grain boundaries misorientations

Exercise 5 - Grain Boundaries :

Exercise 6 - Denoising EBSD Data and Misorientations:

Lecture 11 - Plastic / Elastic Deformation :
stress, strain, deformation tensors, slip systems, Schmid Factor, dislocation systems, GND

Lecture 12 - Tensorial Properties:
wave velocities, visualization, average tensors (Voigt, Reuss, Hill) from EBSD and ODF

Exercise 7 - Tensorial Properties :

Times: Lecture 1: 8:45-10:00, Lecture 2: 10:30 - 11:45, Exercise 1: 13:00-14:30, Exercise 2: 15:00 - 16:00

### Week 2: 15.03.2021 - 17.03.2021

The second week will consist of lectures by invited experts that explain in detail the application of MTEX to specific problems as listed below. Furthermore, current or future users of MTEX are invited to share their experiences with MTEX or ask questions about specific use cases. To encourage discussions we plan with slots of 20 minutes talk given by the participants followed by a 10 minutes discussion. As we expect a very heterogeneous auditorium we kindly ask the participant to keep their talks as simple as possible.
 (Kingston Process Metallurgy, Canada) (University of Minnesota, USA) (ETH Zürich) (DTU, Technical University of Denmark) (Ohio State University) (Carnegie Mellon University, USA) Texture in laser powder bed fusion (LPBF) printing (Los Alamos, USA)

#### Time Schedule

Monday Tuesday Wednesday
9:00 -
10:00
F. Niessen
Parent grain reconstruction
L. Morales
Interphase misorientations
S. Hunt, Energy dispersive XRD,
N. Byres, Texture in hot rolled Ti64 plate
A. Plowman, Crystal plasticity modeling,
10:00 -
10:30
T. Nyyssönen
Twins in reconstructed austenite
Sheng Fan
Dynamic recrystallization in ice
G. Zeng
Nucleation of Al-Mn-(Fe)
10:30 -
11:00
D. Depriester
Meshing and finite element analysis
M.G. Llorens
Dynamic recrystallisation in rocks
M. Witte
MTEX in industrial research
11:00 -
11:30
P. Lehto
Dislocation sub-structures
B. Sørensen
Host / twin classification
G. Nolze
CALM down: Identifying unknown phases
Lunch free discussions
13:30 -
14:30
D. Savage
Graph Based Twin Analysis
Z. Michels
MTEX for structural geologists
A. Rollett
Texture in LPBF printing
14:30 -
15:00
J. Hiscocks
Lies my EBSD system told me
R. Kilian
Quartz textures and deformation
S. Niezgoda
Uncertainty Quantification
15:00 -
15:30
S. Nayir
Low and high angle boundaries
U. Faul
Olivine grain boundaries
Round Table Discussion
Improvements to MTEX
15:30 -
16:00
L. Lutterotti
MAUD and MTEX
M. Allard
Active Slip Systems in Plagioclase
Round Table Discussion
Future Developments in MTEX
16:00 -
16:30
B. Britton