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- Title
Measuring Grain Boundary Character Distributions in Ni-Base Alloy 725 Using High-Energy Diffraction Microscopy.
- Authors
Demkowicz, Michael; Bagri, Akbar; Gradečak, Silvija; Hanson, John; Lind, Jonathan; Suter, Robert; Kenesei, Peter
- Abstract
We use high-energy X-ray diffraction microscopy (HEDM) to characterize the microstructure of Ni-base alloy 725. HEDM is a non-destructive technique capable of providing three-dimensional reconstructions of grain shapes and orientations in polycrystals. The present analysis yields the grain size distribution in alloy 725 as well as the grain boundary character distribution (GBCD) as a function of lattice misorientation and boundary plane normal orientation. We find that the GBCD of Ni-base alloy 725 is similar to that previously determined in pure Ni and other fcc-base metals. We find an elevated density of Σ9 and Σ3 grain boundaries. We also observe a preponderance of grain boundaries along low-index planes, with those along (1 1 1) planes being the most common, even after Σ3 twins have been excluded from the analysis.
- Subjects
NICKEL alloys; HIGH energy electron diffraction; MICROSTRUCTURE; POLYCRYSTALS; KIRKENDALL effect; POLYCRYSTALLINE silicon; ELECTRON diffraction crystallography; CRYSTALLOGRAPHY
- Publication
Metallurgical & Materials Transactions. Part A, 2017, Vol 48, Issue 1, p354
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-016-3831-x