Home > Research > Publications & Outputs > Using transmission Kikuchi diffraction in a sca...

Links

Text available via DOI:

View graph of relations

Using transmission Kikuchi diffraction in a scanning electron microscope to quantify geometrically necessary dislocation density at the nanoscale

Research output: Contribution to journalJournal article

Published
Close
<mark>Journal publication date</mark>02/2019
<mark>Journal</mark>Ultramicroscopy
Volume197
Number of pages7
Pages (from-to)39-45
Publication statusPublished
Early online date22/11/18
Original languageEnglish

Abstract

It is challenging to quantify the geometrically necessary dislocation (GND) density at the nanoscale using conventional electron backscatter diffraction due to its limited spatial resolution. To overcome this problem, in this study, the transmission Kikuchi diffraction (TKD) technique is used to measure lattice orientation and to calculate the corresponding nanoscale GND density. Using the TKD method, a variation of GND density from 6 × 1014 to 1016 m−2 has been measured in a welded super duplex stainless steel sample. The distribution of dislocation density is shown to be in good agreement with transmission electron microscope (TEM) result. Compared with dislocation measurements obtained by TEM, the TKD–GND method is revealed to be a relatively accurate, fast and accessible method. © 2018