University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Digital Image Correlation of 2D X-ray Powder Diffraction Data for Lattice Strain Evaluation

Zhang, Hongjia, Sui, Tan, Salvati, Enrico, Daisenberger, Dominik, Lunt, Alexander, Fong, Kai, Song, Xu and Korsunsky, Alexander (2018) Digital Image Correlation of 2D X-ray Powder Diffraction Data for Lattice Strain Evaluation Materials, 11 (3).

[img]
Preview
Text
Digital Image Correlation of 2D X-ray Powder Diffraction Data for Lattice Strain Evaluation.pdf - Version of Record
Available under License Creative Commons Attribution.

Download (2MB) | Preview

Abstract

High energy 2D X-ray powder diffraction experiments are widely used for lattice strain measurement. The 2D to 1D conversion of diffraction patterns is a necessary step used to prepare the data for full pattern refinement, but is inefficient when only peak centre position information is required for lattice strain evaluation. The multi-step conversion process is likely to lead to increased errors associated with the ‘caking’ (radial binning) or fitting procedures. A new method is proposed here that relies on direct Digital Image Correlation analysis of 2D X-ray powder diffraction patterns (XRD-DIC, for short). As an example of using XRD-DIC, residual strain values along the central line in a Mg AZ31B alloy bar after 3-point bending are calculated by using both XRD-DIC and the conventional ‘caking’ with fitting procedures. Comparison of the results for strain values in different azimuthal angles demonstrates excellent agreement between the two methods. The principal strains and directions are calculated using multiple direction strain data, leading to full in-plane strain evaluation. It is therefore concluded that XRD-DIC provides a reliable and robust method for strain evaluation from 2D powder diffraction data. The XRD-DIC approach simplifies the analysis process by skipping 2D to 1D conversion, and opens new possibilities for robust 2D powder diffraction data analysis for full in-plane strain evaluation.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Zhang, Hongjia
Sui, Tant.sui@surrey.ac.uk
Salvati, Enrico
Daisenberger, Dominik
Lunt, Alexander
Fong, Kai
Song, Xu
Korsunsky, Alexander
Date : 15 March 2018
Identification Number : 10.3390/ma11030427
Copyright Disclaimer : © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords : 2D X-ray powder diffraction; Strain measurement; Digital Image Correlation; 3-point bending
Depositing User : Clive Harris
Date Deposited : 26 Mar 2018 07:58
Last Modified : 26 Mar 2018 08:10
URI: http://epubs.surrey.ac.uk/id/eprint/846078

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800