Journal
ACTA MATERIALIA
Volume 59, Issue 2, Pages 590-601Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2010.09.063
Keywords
Short fatigue cracks; Diffraction contrast tomography; Synchrotron 3-D imaging; In situ; Ti 21S
Funding
- ONR/DARPA [N00015-05-1-0510]
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X-ray diffraction contrast tomography is a recently developed, non-destructive synchrotron imaging technique which characterizes microstructure and grain orientation in polycrystalline materials in three dimensions. By combining it with propagation-based phase-contrast tomography it is possible to get a full picture description for the analysis of local crack growth rate of short fatigue cracks in three dimensions: the three-dimensional crack morphology at different propagation stages, and the shape and orientation of the grains around the crack. An approach has been developed on the metastable beta titanium alloy Ti 21S that allows for visualization and analysis of the growth rate and crystallographic orientation of the fracture surface. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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