Advanced texture measurements on WOMBAT- A round robin with iMateria / J-PARC and JAEA
Crystallographic texture is preferred orientation of the crystallites due to anisotropic properties of how solid material is processed. During plastic deformation slip systems are activated, leading to grain rotation into preferred orientation. These may compete with other processes, such as twinning and recrystallization, forming peculiar fingerprints of texture.
As the mechanical properties of such material are highly anisotropic, the knowledge, modeling, and engineering of texture is of utmost interest for industrial and practical applications. Furthermore, the thermo-mechanic history of an artifact can be determined through the help of texture analysis, which also applies to rocks in geological research and ice for the understanding of glaciers and climate.
Because neutrons have a high penetration depth, textures from the bulk of a sample can be obtained. The capability of texture measurements at the OPAL facility has been initiated within the ThermoMec.Pro project. We have now set up the WOMBAT high-intensity diffractometer for the advanced measurement of texture.
Smart orientation sampling in unconventional steps is employed making full use of the large, two-dimensional detector. Scripting within the dataRring package exists to extract pole figures for the mtex texture package, while input scripts for the MAUD Rietveld program can be made, taking track of all orientation angles.
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