Microstructural Characterization of an Al-Li-Mg-Cu Alloy by Correlative Electron Tomography and Atom Probe Tomography

AbstractCorrelative electron tomography and atom probe tomography have been carried out successfully on the same region of a commercial 8090 aluminum alloy (Al-Li-Mg-Cu). The combination of the two techniques allows accurate geometric reconstruction of the atom probe tomography data verified by crystallographic information retrieved from the reconstruction. Quantitative analysis of the precipitate phase compositions and volume fractions of each phase have been obtained from the atom probe tomography and electron tomography at various scales, showing strong agreement between both techniques.

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Three-Dimensional Microstructural Characterization of Lithium Manganese Oxide with Atom Probe Tomography

Energy Technology ◽

10.1002/ente.201600210 ◽

2016 ◽

Vol 4 (12) ◽

pp. 1565-1574 ◽

Cited By ~ 7

Author(s):

Johannes Maier ◽

Björn Pfeiffer ◽

Cynthia A. Volkert ◽

Carsten Nowak

Keyword(s):

Manganese Oxide ◽

Atom Probe Tomography ◽

Three Dimensional ◽

Microstructural Characterization ◽

Atom Probe ◽

Lithium Manganese Oxide ◽

Lithium Manganese

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Impact of the Co/Ni-Ratio on Microstructure, Thermophysical Properties and Creep Performance of Multi-Component γ′-Strengthened Superalloys

Crystals ◽

10.3390/cryst10111058 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1058

Author(s):

Christopher H. Zenk ◽

Nicklas Volz ◽

Carolin Zenk ◽

Peter J. Felfer ◽

Steffen Neumeier

Keyword(s):

Atom Probe Tomography ◽

Lattice Misfit ◽

Microstructural Characterization ◽

Atom Probe ◽

Creep Tests ◽

Ni Content ◽

Rich Alloy ◽

First Time ◽

Partitioning Behavior

The Ni content is a crucial factor for the development of γ′-strengthened Co-based superalloys and some studies have systematically addressed its influence on various properties in model superalloys. In this paper, we report for the first time the influence of the Co/Ni ratio in the more advanced nine-component superalloy ERBOCo-1: exchanging Co and Ni in this Co/Ni-based superalloy while keeping the other alloying elements constants has a big influence on a variety of material properties. The elemental segregation after casting is slightly more pronounced in the alloy with higher Ni-content. Microstructural characterization of this alloy termed ERBOCo-1X after heat-treatment reveals that the precipitates are cuboidal in the Co- and spherical in the Ni-rich alloy, indicating a decrease in the γ/γ′ lattice misfit. Analyzing the elemental partitioning behavior by atom probe tomography suggests that the partitioning behavior of W is responsible for that. Furthermore, it is found that even though Ni exhibits the highest overall concentration, the γ matrix phase is still Co-based, because Ni is strongly enriched in the γ′ precipitates. Creep tests at 900 °C reveal that even though the microstructure looks less favorable, the creep resistance of the Ni-rich alloy is slightly superior to the Co-rich variant.

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A graph-theoretic approach for characterization of precipitates from atom probe tomography data

Computational Materials Science ◽

10.1016/j.commatsci.2013.04.038 ◽

2013 ◽

Vol 77 ◽

pp. 335-342 ◽

Cited By ~ 12

Author(s):

S. Samudrala ◽

O. Wodo ◽

S.K. Suram ◽

S. Broderick ◽

K. Rajan ◽

...

Keyword(s):

Atom Probe Tomography ◽

Atom Probe ◽

Theoretic Approach ◽

Graph Theoretic ◽

Graph Theoretic Approach ◽

Tomography Data

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Atom Probe Tomography: A Technique for Nanoscale Characterization

Microscopy and Microanalysis ◽

10.1017/s1431927604040577 ◽

2004 ◽

Vol 10 (3) ◽

pp. 336-341 ◽

Cited By ~ 116

Author(s):

M.K. Miller ◽

E.A. Kenik

Keyword(s):

Atom Probe Tomography ◽

Analytical Techniques ◽

Size Composition ◽

Oxide Dispersion Strengthened ◽

Atom Probe ◽

Oxide Dispersion ◽

Mechanically Alloyed ◽

Nanoscale Characterization ◽

Tomography Data

Atom probe tomography is a technique for the nanoscale characterization of microstructural features. Analytical techniques have been developed to estimate the size, composition, and other parameters of features as small as 1 nm from the atom probe tomography data. These methods are outlined and illustrated with examples of yttrium-, titanium-, and oxygen-enriched particles in a mechanically alloyed, oxide-dispersion-strengthened steel.

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