The Structure of β″ and β′ in an Aged Mg-Nd Alloy

Autor:	Emmanuelle A. Marquis, Ellen L.S. Solomon
Rok vydání:	2016
Předmět:	Morphology (linguistics) Materials science Metallurgy Alloy Nucleation Stacking engineering.material Dark field microscopy law.invention Crystallography law Phase (matter) Scanning transmission electron microscopy engineering Electron microscope
Zdroj:	Magnesium Technology 2016 ISBN: 9783319486208 Magnesium Technology 2016
Popis:	The structures of the β″ and β′ phases in a Mg-2.35 wt. % Nd alloy aged at 250°C for 3 min, 15 min and 2 hr were investigated using high-angle annular dark field scanning transmission electron microscopy. Both phases consist of different arrangements of Nd atoms including triangular structures and hexagonal rings. In the [0001]Mg orientation, some β′ precipitates also exhibit unexpected D019 stacking, which is explained by a projection artifact of stacking defects visible in the Mg zone axes. The β′ phase appears to nucleate from preexisting s” chains. The β′ phase is coherent and contains the highest strain along the Mg directions, which agrees with the morphology of the precipitates being thinnest along the Mg directions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5efff2a98b048e523c73fb023613d73f https://doi.org/10.1007/978-3-319-48114-2_30 Zobrazit plný text záznamu