Characterizing Precipitation Defects in Nickel Based 718 Alloy

Aliou Niang; Julitte Huez; Jacques Lacaze; Bernard Viguier

doi:10.4028/www.scientific.net/MSF.636-637.517

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HomeMaterials Science ForumMaterials Science Forum Vols. 636-637Characterizing Precipitation Defects in Nickel...

Characterizing Precipitation Defects in Nickel Based 718 Alloy

Abstract:

In the present study we examine the crystallographic structure of the , ’’ and  phases present in nickel base 718 alloy. The chemical ordering of Nb atoms and possible planar faults that may be observed in ’’ precipitates are detailed. High resolution transmission electron microscopy (HRTEM) observations of various faults are reported. The decomposition of a matrix dislocation to form a locked V shaped configuration is shown. The observation along [110] type direction allows to identify the type of defect, which is observed as a pure geometric stacking fault.

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Materials Science Forum (Volumes 636-637)

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517-522

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https://doi.org/10.4028/www.scientific.net/MSF.636-637.517

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Online since:

January 2010

Authors:

Aliou Niang, Julitte Huez, Jacques Lacaze, Bernard Viguier

Keywords:

Gamma Double Prime, HRTEM, Inconel 718, Ni₃Nb, Nickel-Based Superalloy, Stacking Fault

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