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Where Does the Lithium Go? – A Study of the Precipitates in the Stir Zone of a Friction Stir Weld in a Li‐containing 2xxx Series Al Alloy
Author(s) -
Rao Jiancun,
Payton Eric J.,
Somsen Christoph,
Neuking Klaus,
Eggeler Gunther,
Kostka Aleksander,
dos Santos Jorge F.
Publication year - 2010
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200900284
Subject(s) - materials science , friction stir welding , alloy , lithium (medication) , metallurgy , welding , series (stratigraphy) , medicine , paleontology , biology , endocrinology
The main strengthening precipitates of aluminum alloy 2198‐T8, which are of the T 1 phase, dissolve during friction stir welding, sending many Li atoms into solid solution. The stir zone precipitates are characterized using high‐resolution transmission electron microscopy, energy dispersive spectroscopy, and selected area diffraction techniques to begin answering questions about the microstructural evolution and the relationship between microstructure and mechanical properties in friction stir welding of the next generation of lightweight Li‐containing Al alloys.

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