Three-dimensional imaging of dislocations in a Ti-35mass%Nb alloy by electron tomography

Sato, Kazuhisa; Semboshi, Satoshi; Konno, Toyohiko J.

Materials, 2015, 8(4), 1924-1933

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Identifier to cite or link to this item: https://hdl.handle.net/11094/89419

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Title
Three-dimensional imaging of dislocations in a Ti-35mass%Nb alloy by electron tomography
Creator
NRID
1000070314424 1000070314424
ORCID
0000-0001-9078-2541 0000-0001-9078-2541
researchmap permalink
read0158304 read0158304
Scopus Author ID
55552977400 55552977400
CreatorName
Sato, Kazuhisa
NRID
1000000364026 1000000364026
CreatorName
Semboshi, Satoshi
NRID
1000090260447 1000090260447
CreatorName
Konno, Toyohiko J.
Subject
3D configurations
Dislocations
Electron tomography
Scanning transmission electron microscopy (STEM)
Ti-Nb
Description
Sato K, Semboshi S, Konno TJ. Three-Dimensional Imaging of Dislocations in a Ti–35mass%Nb Alloy by Electron Tomography. Materials. 2015; 8(4):1924-1933. https://doi.org/10.3390/ma8041924.
Abstract
We have studied three-dimensional (3D) configurations of dislocations in the β phase of a Ti-35mass%Nb alloy by means of single-axis tilt tomography using bright-field scanning transmission electron microscopy (BF-STEM). To visualize dislocations, the hh0 systematic reflections were excited throughout tilt-series acquisition with the maximum tilt angle of 70°. Dislocations in the β grains were clearly reconstructed by the weighted back-projection algorithm. The slip planes of the dislocations were deduced by rotating the reconstructed volumes with the aid of selected area electron diffraction patterns. It was found that BF-STEM images with relatively low contrasts, taken along low-order zone axes, are capable to reproduce and preserve the quality of reconstructed image of dislocations. We also found that tilt angles as low as 40° are practically acceptable to visualize 3D configurations of dislocations, while there exists limitation in resolution due to the existence of a large missing wedge.
Publisher
MDPI
Source Title
Materials
Volume (Issue)
8(4)
Page
1924-1933
Date of Issued
2015-04-21
Language
English
Handle URL
https://hdl.handle.net/11094/89419
eISSN
19961944
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3390/ma8041924
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Category
学術雑誌論文 Journal Article