Nanoscale Characterization of Elemental Partitioning between Gamma and Gamma Prime Phases in René 88 DT Nickel-Base Superalloy

The chemical partitioning of alloying elements between the disordered γ and ordered γ ′ phases in the nickel-base superalloy René 88 DT, has been characterized in detail using three-dimensional atom probe tomography (3DAP) coupled with energy-filtered transmission electron microscopy (EFTEM) studies...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2009, Vol.40 (1), p.24-35
Hauptverfasser:	Hwang, J.Y., Banerjee, R., Tiley, J., Srinivasan, R., Viswanathan, G.B., Fraser, H.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aging Alloys Applied sciences Characterization and Evaluation of Materials Chemistry and Materials Science Cooling Exact sciences and technology Gas turbine engines Homogenization Jet engines Materials Science Metal fatigue Metallic Materials Metals. Metallurgy Microstructure Morphology Nanotechnology Powder metallurgy Structural Materials Superalloys Surfaces and Interfaces Thin Films Tomography Transmission electron microscopy
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Zusammenfassung:	The chemical partitioning of alloying elements between the disordered γ and ordered γ ′ phases in the nickel-base superalloy René 88 DT, has been characterized in detail using three-dimensional atom probe tomography (3DAP) coupled with energy-filtered transmission electron microscopy (EFTEM) studies. After a homogenization treatment followed by a water quench, it is observed that the morphology of the γ ′ precipitates remains near spherical even after long aging times. Compositional variation, observed between small (
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-008-9691-2