Phase Identification in Nickel-Based Superalloys Using EBSD/SEM and Electron Diffraction in STEM

Bartosz Chmiela; Maria Sozańska; Kinga Rodak

doi:10.4028/www.scientific.net/SSP.186.58

Paper Titles

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Investigations of Fine Grained Metallic Materials by Means of Orientation Maps in Transmission Electron Microscope
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Phase Identification in Nickel-Based Superalloys Using EBSD/SEM and Electron Diffraction in STEM
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HomeSolid State PhenomenaSolid State Phenomena Vol. 186Phase Identification in Nickel-Based Superalloys...

Phase Identification in Nickel-Based Superalloys Using EBSD/SEM and Electron Diffraction in STEM

Abstract:

Aero engine turbine blades made of nickel-based superalloys are critical components in flight safety. Therefore, it is very important to make sure that the chemical composition, phase composition and microstructure are suitable. However, due to their chemical compositions, superalloys are prone to many transformations and the formation of deleterious phases, which deteriorate the mechanical properties. Hence, investigations concerning the structural stability and phase identification—especially topologically close-packed phases (TCP)—are necessary. Because the volume fractions of these phases are generally small, phase identification should be performed by nanodiffraction techniques in a scanning transmission electron microscope (STEM) and electron backscatter diffraction in a scanning electron microscope (EBSD/SEM). These methods complement each other, but each of them is characterized by different difficulties and limitations. In this paper we present the possibilities and limitations of phase identification in single crystal CMSX-4 superalloy after long thermal exposure.

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Periodical:

Solid State Phenomena (Volume 186)

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58-61

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https://doi.org/10.4028/www.scientific.net/SSP.186.58

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Online since:

March 2012

Authors:

Bartosz Chmiela, Maria Sozańska, Kinga Rodak

Keywords:

EBSD, Electron Diffraction, Phase Identification, Topologically Close-Packed Phase

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