Study of the Q′ (Q)-phase precipitation in Al–Mg–Si–Cu alloys by quantification of atomic-resolution transmission electron microscopy images and atom probe tomography

• Published in: Journal of Materials Science Vol. 54; no. 10; pp. 7943 - 7952
• Main Authors: Ding, Lipeng, Orekhov, Andrey, Weng, Yaoyao, Jia, Zhihong, Idrissi, Hosni, Schryvers, Dominique, Muraishi, Shiji, Hao, Longlong, Liu, Qing
• Format: Journal Article
• Language: English
• Published: New York Springer Science and Business Media LLC 01.05.2019; Springer US; Springer; Springer Nature B.V
• Subjects: Aging (metallurgy); Alloys; aluminum; Aluminum alloys; Aluminum base alloys; Atom probe tomography; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Composition; Copper; Crystal lattices; Crystal structure; Crystallography and Scattering Methods; Electron microscopy; High angle annular dark-field scanning; Image transmission; Investigations; Lattice parameters; Magnesium; Materials Science; Metals; Metals (Materials); Metastable phases; Microscopy; mixing; Occupancy; Physics; Polymer Sciences; Precipitation; Precipitation (Meteorology); Scanning transmission electron microscopy; Silicon; Solid Mechanics; Specialty metals industry; temperature; Tomography; Transmission electron microscopy

The precipitation mechanism of the Q phase in Al–Mg–Si–Cu alloys has long been the subject of ambiguity and debate since its metastable phase (Q′) has the same crystal structure and similar lattice parameters as its equilibrium counterparts. In the present work, the evolution of the Q′ (Q) phase dur...