Journal article
Site-specific atomic scale analysis of solute segregation to a coincidence site lattice grain boundary
Ultramicroscopy, v 110(4), pp 278-284
01 Mar 2010
PMID: 20097006
Abstract
A site-specific method for measuring solute segregation at grain boundaries in an Aluminum alloy is presented. A Sigma 7(Sigma 7=38 degrees<1 1 1 >) grain boundary (GB) in an aluminum alloy (Zr, Cu as main alloying elements) was evaluated using site-specific Local Electrode Atom Probe (LEAP). A sample containing a Sigma 7 GB was prepared by combining electron backscatter diffraction (EBSD) and focused ion beam (FIB) milling to locate the GB of interest and extract a specimen. Its composition was determined by LEAP, and compared to a general high angle GB (HAGB). Zr was the only alloying element present in the Sigma 7 GB, whereas the general HAGB contained both Cu and Zr. This site-specific LEAP method was found to be an accurate method for measuring GB segregation at specific GB misorientations. The method has advantages over other methods of measuring chemistry at GBs, such as spectroscopy, in that GB structure can be assessed in three dimensions. (C) 2009 Elsevier B.V. All rights reserved.
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Details
- Title
- Site-specific atomic scale analysis of solute segregation to a coincidence site lattice grain boundary
- Creators
- Mitra L. Taheri - Drexel UniversityJason T. Sebastian - Northwestern UniversityBryan W. Reed - Lawrence Livermore National LaboratoryDavid N. Seidman - Northwestern UniversityAnthony D. Rollett - Carnegie Mellon University
- Publication Details
- Ultramicroscopy, v 110(4), pp 278-284
- Publisher
- Elsevier
- Number of pages
- 7
- Grant note
- DMR-0520425 / National Science Foundation; National Science Foundation (NSF) Lawrence Livermore National Laboratory; United States Department of Energy (DOE) Alcoa Technical Center Commonwealth of Pennsylvania DE-AC02-05CH11231 / US Department of Energy; United States Department of Energy (DOE) DE-AC52-07NA27344 / Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the US Department of Energy; United States Department of Energy (DOE) National Center for Electron Microscopy, Lawrence Berkeley Lab US Department of Energy; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000276290200002
- Scopus ID
- 2-s2.0-77649183420
- Other Identifier
- 991019330914704721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Microscopy