The workshop extends over two weeks and is part of the master course Introduction into crystallographic texture analysis and counts for 5 ECTS 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. A special focus will be on grain boundary statistics and new functionalities in MTEX 6.1. Participation is possible in presence as well as remotely.
Week 1: Learning Crystallographic Texture Analysis with MTEX
Date: 03.03.2025 - 07.03.2025
During the first week we provide on a daily basis lectures covering the principles of EBSD, texture and crystallography and their relation to plastic deformation and macroscopic properties. All concepts will be illustrated via practical examples during the exercises within MTEX.
Matlab basics and general concepts of MTEX, the class vector3d, spherical coordinates
Lecture 1 - EBSD (Rüdiger Kilian)
principle concept, data import, basic data cleanup, orientation maps, color keys
Exercise 1
Lunch
Lecture 2 - Orientations and Symmetries (Ralf Hielscher)
crystal lattice, direct and reciprocal coordinate system, Miller indices, zonal axes, crystal shapes, point groups, Laue groups, symmetrically equivalent orientations, pole figures, inverse pole figures, fundamental sectors
Exercise 2
segmentation, shape properties, orientation properties, grain selection, grain statistics
Exercise 3
Lunch
Lecture 4 - Misorientations and Grain Boundaries (Vivian Tong)
grain boundary misorientations, misorientation axis, misorientation angle, KAM, GOS, IGMA, twin boundaries, tilt vs. twist boundaries, orientation, gradients, statistics of boundary networks
Exercise 4
Lunch
Lecture 5 - Density Functions (Ralf Hielscher)
kernel density estimation, orientation density function, pole density function, inverse pole density function, model ODFs, ODF characteristics, random sampling, ODF reconstuction from XRD data
Exercise 5
Correction of spatial coordinates, reference frame alignment, denoising
Exercise 6 - Grain Boundaries and Misorientations
Lunch
Lecture 7 - Quantitative Microstructure Analysis (Rüdiger Kilian)
grain shape statistics, grain boundary statistics
**Exercise 7 - **
Lecture 9 - Plasticity (Ralf Hielscher)
deformation tensors, slip systems, dislocation systems, Schmid Factor, Taylor factor,
lunch
Lecture 10 - Parent Grain Reconstruction (Ralf Hielscher)
determination of orientation relationships, phase transition, parent grain reconstruction, transformation textures, variant selection
Free Discussion of Personal Data Sets
Times: Lecture 1: 8:00 - 9:30, Exercise 1: 10:00 - 11:30, Lecture 2: 13:00-14:30, Exercise 2: 15:00 - 16:30
Week 2: MTEX in Applications
Date: 10.03.2025 - 13.03.2025
The second week is a get together of new and experienced MTEX users to share their use cases of MTEX, research results and MTEX specific tricks and tips. There will be introductory lectures by invited experts that explain their workflow in specific applications of MTEX. To encourage discussions we plan with slots of 20 minutes talks followed by 10 minute discussions. As we expect a very heterogeneous auditorium we kindly ask the participants to keep their talks as accessible as possible.
Keynote Speakers
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Katharina Marquardt (University of Oxford)
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Gert Nolze (Bundesanstalt für Materialforschung)
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João Quinta da Fonseca (University of Manchester)
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Daniel Savage (Los Alamos National Laboratory)
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Bjørn Eske Sørensen (NTNU): Customizing EBSD analysis and interpretation using MTEX and MATLAB – advantages of the scripting approach
Venue:
Hotel Kreller: 80 Euro per night with breakfast, very close
Hotel am Obermarkt: 79 Euro per night without breakfast, very close
Elly Hostel: 77 Euro per night, with kitchen
Registration:
- Please register at https://acatrain.net/events/freiberg-mtex-workshop-2025
- Deadline for registration is 21st of February 2025
Registration Fee:
- first + second week (presence): (PhD) students - 400 Euro, other - 600 Euro
- first + second week (online): (PhD) students - 200 Euro, other - 300 Euro
- second week: (PhD) students - 100 Euro, other - 200 Euro
- Payment includes: Lunch for all days and Excursion fee
- Registration for students of the TU Freiberg and the University of Halle is free of charge
Organizers:
Ralf Hielscher (TU Bergakademie Freiberg), Rüdiger Kilian (Universität Halle), Luiz Morales (ETH Zürich), Vivian Tong (National Physical Laboratory UK)
