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.
Highlights
The definition of crystalline anisotropy, known as texture, is the key in many technological and solid-state processes since many properties such as mechanical properties, deform-ability, magnetic properties, or several metallic processes such as plastic deformation, recrystallization are texture dependent
Conventional X-ray diffraction-based pole figure measurements have been carried on with dedicated instrument which are accompanied with certain limitations such as sample size, geometry, and no possibility for on-site measurements
The present paper introduces new texture measurement method developed on mobile centreless X-ray diffractometers which are originally applied for residual stress measurements
Summary
The definition of crystalline anisotropy, known as texture, is the key in many technological and solid-state processes since many properties such as mechanical properties, deform-ability, magnetic properties, or several metallic processes such as plastic deformation, recrystallization are texture dependent. The present paper introduces new texture measurement method developed on mobile centreless X-ray diffractometers which are originally applied for residual stress measurements. The essence of this new method, named reverse modified mode is that it uses the data obtained by residual stress measurement to describe anisotropic characteristics, even to the determination of pole figure.
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