Characterizing deformed ultrafine-grained and nanocrystalline materials using transmission Kikuchi diffraction in a scanning electron microscope

Patrick W. Trimby, Yang Cao, Zibin Chen, Shuang Han, Kevin J. Hemker, Jianshe Lian, Xiaozhou Liao, Paul Rottmann, Saritha Samudrala, Jingli Sun, Jing Tao Wang, John Wheeler, Julie M. Cairney

Research output: Journal article publicationJournal articleAcademic researchpeer-review

131 Citations (Scopus)

Abstract

The recent development of transmission Kikuchi diffraction (TKD) in a scanning electron microscope enables fast, automated orientation mapping of electron transparent samples using standard electron backscatter diffraction (EBSD) hardware. TKD in a scanning electron microscope has significantly better spatial resolution than conventional EBSD, enabling routine characterization of nanocrystalline materials and allowing effective measurement of samples that have undergone severe plastic deformation. Combining TKD with energy dispersive X-ray spectroscopy (EDS) provides complementary chemical information, while a standard forescatter detector system below the EBSD detector can be used to generate dark field and oriented dark field images. Here we illustrate the application of this exciting new approach to a range of deformed, ultrafine grained and nanocrystalline samples, including duplex stainless steel, nanocrystalline copper and highly deformed titanium and nickel-cobalt. The results show that TKD combined with EDS is a highly effective and widely accessible tool for measuring key microstructural parameters at resolutions that are inaccessible using conventional EBSD.

Original languageEnglish
Pages (from-to)69-80
Number of pages12
JournalActa Materialia
Volume62
Issue number1
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

Keywords

  • Electron backscatter diffraction
  • Nanocrystalline
  • Severe plastic deformation
  • Transmission Kikuchi diffraction
  • Ultrafine grained

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Fingerprint

Dive into the research topics of 'Characterizing deformed ultrafine-grained and nanocrystalline materials using transmission Kikuchi diffraction in a scanning electron microscope'. Together they form a unique fingerprint.

Cite this