Novel applications of centreless X-ray diffractometers for non-destructive pole figure measurements

Sepsi, Máté and Mertinger, Valéria and Benke, Márton (2019) Novel applications of centreless X-ray diffractometers for non-destructive pole figure measurements. In: 7th International Conference on Recrystallization and Grain Growth, 2019- Aug. 4-9, Ghent, Belgium.

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Abstract

Centreless X ray diffractometers are specially designed for non-destructive residual stress measurements. The similarity between the X-ray diffraction-based stress and texture measurement methods led us to introduce a new method on non-destructive (sample cutting-free) stress measurement devices to studies on crystallographic texture. The method that determines texture characteristics from residual stress data has recently been introduced. Afterwards, a method with which pole figures (fully equivalent to conventionally measured pole figures) at high Bragg-angles can be constructed with centreless diffractometers were developed. The paper gives an illustration of the new methods’ utilization on the field of archaeometry. In that area, only non-destructive testing modes are permitted. In the case of archaeological finds, knowing the crystallographic texture assists to reconstruct the ancient process technology (hammering, rolling, annealing) that was applied during the manufacturing. The new methods are suitable to be used on valuable and unique objects both in the automotive industry, archaeometry and in the space applications.

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