Characterizing Precipitation Defects in Nickel Based 718 Alloy

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 636-637)

Edited by:

Luís Guerra ROSA and Fernanda MARGARIDO

Pages:

517-522

DOI:

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

Citation:

A. Niang et al., "Characterizing Precipitation Defects in Nickel Based 718 Alloy", Materials Science Forum, Vols. 636-637, pp. 517-522, 2010

Online since:

January 2010

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Price:

$35.00

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