Abstract

Crystallographic texture is described by pole figures. In this paper, we continue to study experimental pole figure errors. In other words it can be named pole figure measurement errors. These errors are connected with the experimental procedure and do not depend on any further computations. In our previous works it was shown that the qualitative behaviour of pole figure measurement errors is similar to peak width determination errors. To check this conclusion a set of diffraction spectra were measured for Mg + 4.5%Al + 1%Zn sample on the spectrometer for quantitative texture analysis (SKAT) at FLNP, JINR, Dubna. Then we simulated the individual spectra and used these spectra for the pole figure extraction and the pole figure error determination. Such simulation enabled to confirm conclusions concerning the main role of the peak width determination error in the pole figure error. Additionally, we simulated individual spectra using model pole figures and extracted pole figures and pole figures errors from those spectra. For this case we also confirmed the same qualitative behaviour of pole figure measurement errors and peak width determination errors. The model pole figures were calculated on the basis of normal distributions.

Highlights

  • The neutron diffraction experiment is one of the methods for obtaining information about crystallographic texture

  • In our previous papers [6, 7] we proposed a method to determine experimental pole figures measurement errors directly coming from the experiment and being independent on any orientation distribution function (ODF) reconstruction methods

  • The Rietveld texture analysis (RITA) procedure is used, for example, to extract texture information from time-of-flight neutron spectra obtained by the diffractometer HIPPO (Los Alamos Neutron Science Centre) [27, 28]

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Summary

Introduction

The neutron diffraction experiment is one of the methods for obtaining information about crystallographic texture. The local peak fit approach gives us a tool for pole figure intensity and pole figure measurement errors determination This approach is described in our previous works [6, 7]. To check this conclusion spectra simulations have been done The purpose of such simulations is to be convinced that such behaviour of pole figure errors is a property of the spectrometer SKAT. It can be checked up by means of spectra simulations because the errors entered into the spectra at the simulations are not connected with a special measurement process

Fundamentals
Spectra Simulation
Results and Discussion
Summary
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