Expert Committee

Textures

Understanding and measuring crystallographic textures to relate them to material properties.

Crystallite orientations shape anisotropy and the properties of polycrystalline materials.

Members145

Founded1985

UnitDGM e.V.

Chair

Prof. Dr. Werner Skrotzki
TU Dresden

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The DGM Expert Committee on Textures addresses crystallographic textures in polycrystalline materials. Its focus includes measurement techniques, mathematical data analysis, texture formation, and the relationship between texture and material properties.

The Committee connects materials science, mechanical engineering, physics, and geoscience with industrial metal production and processing as well as texture measurement and texture analysis.

01 · Technical focus

Understanding and applying textures

Measurement

Measuring and analysing textures

Measurement data require appropriate analysis and reliable interpretation.

The scope includes texture measurement, mathematical data analysis, and the evaluation of orientation data in polycrystalline materials.

Formation

Texture formation and microstructural processes

Forming and heat treatment alter crystallite orientations.

Analyses after thermomechanical treatment provide insight into crystallization, plastic deformation, recrystallization, grain growth, and phase transformations.

Properties

Texture and anisotropy

Crystallographic orientation influences mechanical and magnetic properties.

The Committee considers the correlation between texture and properties as well as the production and application of textured materials.

02 · Exchange and cooperation

Connected across disciplines

The Committee brings together specialists from materials science, mechanical engineering, physics, and geoscience with representatives from industry. Exchange focuses in particular on metal production and processing as well as texture measurement and texture analysis.

Joint research and development projects, conferences, and training events connect working groups from universities, research institutes, and industry. Texture research in Germany is also represented at international conferences and symposia, including ICOTOM, which takes place every three years.

03 · Method development

Advancing measurement and simulation

In situ

Synchrotron and neutron radiation

Textures can be studied during deformation and thermal treatment.

In-situ measurements using synchrotron and neutron radiation on bulk samples are an important field for further research.

Microstructure

Electron diffraction in the scanning electron microscope

Local textures and microstructure need to be considered together.

Established electron diffraction in the scanning electron microscope supports the understanding of interactions between local textures and microstructure.

Fine-grained materials

Submicron to nanometre grain sizes

New forming methods place particular demands on texture measurement.

Texture measurements on materials with submicron to nanometre grain sizes, which can be produced by new forming methods, remain a technical challenge.

Prediction

Improving texture simulations

Reliable predictions link texture with material properties.

Texture simulations need to be further developed to enable viable predictions of texture and material properties.

In crystallography, texture describes the relative orientation of individual grains, or crystallites, in a polycrystalline solid. This orientation influences anisotropy and, consequently, properties such as mechanical and magnetic behavior. Textures can be tailored by specific treatment for the intended application.

Changes in texture after thermomechanical treatment provide insight into solid-state processes such as crystallization, plastic deformation, recrystallization, grain growth, and phase transformations. Deposition from gaseous and liquid phases can also be relevant in this context.

Further development is needed for in-situ measurements using synchrotron and neutron radiation, for example during deformation or thermal treatment of bulk samples. Electron diffraction in the scanning electron microscope can help to improve the understanding of interactions between local textures and microstructure. Other tasks include measurements on materials with submicron to nanometre grain sizes and improved texture simulations for viable predictions of texture and properties.

A closer connection between texture research, which has so far been mainly oriented towards fundamental research, and industry is another objective.