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HR-EBSD Measurements near Twins in Zicaloy-2

Abstract:

Stress fields close to twin tips and the associated local neighbourhoods of a hexagonal close-packed (HCP) polycrystal were studied in details. For this purpose, a coarse grain textured Zircaloy-2 sample was firstly strained uniaxially in a macroscopic direction that favours tensile twin formation. The sample was then unloaded and residual elastic strains and lattice rotations measured using the high-resolution electron backscatter diffraction (HR-EBSD) technique. Measured elastic strain maps...

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Department:
University of Oxford
Role:
Researcher
Department:
University of Oxford
Role:
Principal Investigator
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Grant:
EP/K034332/1
Funding agency for:
Project
Publisher:
University of Oxford
Publication date:
2015
DOI:
Data collected:
2014 - 2015
Language:
English
Keywords:
Subjects:
Format:
Digital
Documentation:
HR-EBSD measurements made on a Zircaloy-2 sample deformed to 2.7% in tension to generate multiple deformation twins. HR-EBSD measurements were made using A Bruker HReFlash detector mounted on a Zeiss Merlin SEM. Sample preparation used Ar ion beam milling on a Gatan PECS II system as a final step. The strain, stress and dislocation density variations available here were then calculated using in-house Matlab code (XEBSD) described in the following publications: High resolution electron backs... Expand documentation

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