An in-situ high-resolution transmission electron microscopy study of the growth and dissolution of theta({111}) precipitate plates in an Al-Cu-Mg-Ag alloy

摘要

In-situ hot-stage high-resolution transmission electron microscopy investigations were performed to determine the atomic mechanisms and growth kinetics of theta-Al2Cu precipitate plates with a {111} habit plane in an Al-3.9 wt% Cu-0.5 wt % Mg-0.5 wt % Ag alloy. In order to obtain a three-dimensional description of precipitate growth mechanisms, the studies were performed along two principal directions. In the first direction, along [001](theta)//[1 1(2) over bar1