Atomic structure and growth mechanism of T1 precipitate in Al–Cu–Li–Mg–Ag alloy. (December 2015)

• Record Type: Journal Article
• Authors: Kang, Sung Jin; Kim, Tae-Hoon; Yang, Cheol-Woong; Lee, Je In; Park, Eun Soo; Noh, Tae Won; Kim, Miyoung
• Is Part Of: Scripta materialia. Volume 109(2015)
• Page Start: 68
• Page End: 71
• Publication Date: 2015-12
• Subjects: T1 phase -- Z-contrast microscopy -- Energy dispersive X-ray spectroscopy (EDXS) -- Scanning/transmission electron microscopy (STEM) -- Aluminum alloys; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.07.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: The atomic structure of a 0.94-nm-thick T1 precipitate in an Al–Cu–Li–Mg–Ag alloy is investigated by combining aberration-corrected scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDX). Ag segregates at the first layer of the T1 precipitate interface, revealing a significant compositional variation of Ag throughout the interface. Moreover, the T1 precipitate thickened from 0.94 nm with successive stacking of identical 0.94 nm thick layers.