Title

Ag2Al Plates In Al-Ag Alloys

Keywords

Al-Ag alloys; Atomic number contrast; Precipitates; Scanning transmission electron microscopy

Abstract

The late stages of precipitation in aluminum-rich Al-Ag alloys with silver contents from 3 at.% to 22 at.% were studied with transmission electron microscopy. Shapes, sizes, and arrangements of plates of the stable hexagonal Ag2Al phase forming on {111} planes of the f.c.c. matrix were analysed. The high-angle annular dark-field contrast in scanning transmission electron microscopy is calibrated. This calibration allows for the quantitative measurement of plate thicknesses from high-angle annular dark-field scanning transmission electron micrographs of Ag2Al plates inclined to the electron beam. Results from these measurements are in good agreement with direct bright-field micrographs of plates viewed edge-on. For samples with silver contents above 12 at.% a parallel lamellar arrangement of fine γ-plates and Al-rich matrix is found after extended heat treatments. © Carl Hanser Verlag.

Publication Date

1-1-2006

Publication Title

Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques

Volume

97

Issue

3

Number of Pages

325-328

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.3139/146.101259

Socpus ID

33645523826 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33645523826

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