3D electron backscatter diffraction characterization of fine α titanium microstructures: collection, reconstruction, and analysis methods

dc.contributor.author DeMott, Ryan
dc.contributor.author Haghdadi, Nima
dc.contributor.author Kong, Charlie
dc.contributor.author Gandomkar, Ziba
dc.contributor.author Kenney, Matthew
dc.contributor.author Primig, Sophie
dc.contributor.department Materials Science and Engineering
dc.contributor.department Ames Laboratory
dc.date.accessioned 2022-01-06T18:17:51Z
dc.date.available 2022-01-06T18:17:51Z
dc.date.issued 2021-11
dc.description.abstract 3D electron backscatter diffraction (3D-EBSD) is a method of obtaining 3-dimensional crystallographic data through serial sectioning. The recent advancement of using a Xe+ plasma focused ion beam for sectioning along with a complementary metal-oxide semiconductor based EBSD detector allows for an improvement in the trade-off between volume analyzed and spatial resolution over most other 3D characterization techniques. Recent publications from our team have focused on applying 3D-EBSD to understand microstructural phenomena in Ti-6Al-4V microstructures as a function of electron beam scanning strategies in electron beam powder bed fusion additive manufacturing. The microstructures resulting from this process have fine features, with α laths as small as 1 μm interwoven in a highly complex fashion, presenting a significant challenge to characterize. Over the course of these fundamental works, we have developed best-practice 3D-EBSD collection protocols and advanced methods for 3D data reconstruction and analysis of such microstructures which remain unpublished. These methods may be of interest to the 3D materials characterization community, especially considering the lack of standard commercial software tools. Thus, the current paper elaborates on the methods and analysis used to characterize fine titanium microstructures using 3D-EBSD and presents a detailed description of the new algorithms developed for probing the unique features therein. The new analyses include algorithms for identifying intervariant boundary types, classifying three-variant clusters, assigning grains to variants, and quantifying interconnectivity of branched α platelets.
dc.description.comments This article is published as DeMott, Ryan, Nima Haghdadi, Charlie Kong, Ziba Gandomkar, Matthew Kenney, Peter Collins, and Sophie Primig. "3D electron backscatter diffraction characterization of fine α titanium microstructures: collection, reconstruction, and analysis methods." Ultramicroscopy 230 (2021): 113394. DOI: 10.1016/j.ultramic.2021.113394. Copyright 2021 The Author(s). Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0). Posted with permission.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/qzoDJBaw
dc.publisher Elsevier B.V.
dc.source.uri https://doi.org/10.1016/j.ultramic.2021.113394 *
dc.subject 3D characterization
dc.subject Serial sectioning
dc.subject Plasma focused ion beam
dc.subject Electron backscatter diffraction
dc.subject Titanium alloys
dc.subject Grain boundaries
dc.subject.disciplines DegreeDisciplines::Engineering::Materials Science and Engineering
dc.title 3D electron backscatter diffraction characterization of fine α titanium microstructures: collection, reconstruction, and analysis methods
dc.type Article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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