Characterisation of the Structure of Single-Crystal Nickel-Base Superalloys

Alexander Epishin; Thomas Link; Udo Brückner

doi:10.4028/www.scientific.net/MSF.638-642.2227

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HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Characterisation of the Structure of...

Characterisation of the Structure of Single-Crystal Nickel-Base Superalloys

Abstract:

New experimental methods developed by the authors for characterisation of the structure of single-crystal nickel-base superalloys are presented: X-ray diffraction at defined areas of the dendritic structure, none destructive SEM investigation of ’-morphology changes for different creep stresses and times with one specimen, and high resolution SEM investigations of dislocations in the ’-interfaces. Application of these techniques allowed to obtain new results, e.g. about the mosaicity of dendritic subgrains, distribution of the ’-misfit within a single dendrite and kinetics of rafting during creep in the superalloy CMSX-4 in wide temperature and stress ranges.

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Materials Science Forum (Volumes 638-642)

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2227-2232

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.2227

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Online since:

January 2010

Authors:

Alexander Epishin, Thomas Link, Udo Brückner

Keywords:

Nickel-Based Superalloy, Scanning Electron Microscope (SEM), Structure, X-Ray Diffraction (XRD)

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