Table of Contents
Textures and Microstructures
Volume 13, Issue 2-3, Pages 123-131
http://dx.doi.org/10.1155/TSM.13.123

Automated Determination of Lattice Orientation From Electron Backscattered Kikuchi Diffraction Patterns

1Department of Mechanical Engineering, Yale University, New Haven, CT 06520-2157, USA
2Singapore Institute of Standards and Industrial Research, 0511, Singapore

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Advantages of using single orientations measurements over the traditional bulk measurement using pole figures are: direct access to odd-l terms in the series expansion of the Orientation Distribution Function (ODF) (Bunge, 1982) and the capability to measure local textures and to obtain spatial orientation correlation information. The primary obstacle to the use of single orientation measurements is the large investment of direct operator time required to obtain a statistically reliable data set. This study examines a technique that has been developed to automate the orientation identification process. The technique essentially compares an electron backscattered Kikuchi diffraction (BKD) pattern with a set of idealized patterns and finds the best match. The set of idealized patterns is created from a set of orientations which represent a tessellation of the asymmetric region of Euler space. The technique shows promising preliminary results, BKD patterns for silicon and stainless steel were correctly identified by the computer.