Title :

On the atomic model of Guinier-Preston zones in Al-Mg-Si-Cu alloys

Author(s) :

Liu, Siliang [Auteur]
Li, Kai [Auteur]
Lu, Jiangbo [Auteur]
Sha, Gang [Auteur]
Wang, Jianchuan [Auteur]
Yang, Mingjun [Auteur]
Ji, Gang [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Song, Min [Auteur]
Wang, Jiong [Auteur]
Du, Yong [Auteur]

Journal title :

Journal of Alloys and Compounds

Volume number :

745

Pages :

644-650

Publication date :

2018

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

English abstract : [en]

Structural feature of equiaxed Guinier-Preston zones with the diameter of ∼2 nm in an Al-Mg-Si-Cu alloy has been systematically investigated by three-dimensional atom probe analyses, high-resolution electron microscopy and ...
Show more >Structural feature of equiaxed Guinier-Preston zones with the diameter of ∼2 nm in an Al-Mg-Si-Cu alloy has been systematically investigated by three-dimensional atom probe analyses, high-resolution electron microscopy and first-principles calculations. The results suggest that Si and Mg planes alternate along [001]Al with Cu atoms diversely substituting for some Si sites. An fcc-based Mg1(Si,Cu)1 model was then proposed for the first time, with expanded a, b and compressed c lattice parameters compared to Al. Meanwhile the structural evolution of Mg1(Si,Cu)1 → (Mg,Cu)1(Si,Cu)1 → β″-(Mg,Cu)1Mg4(Al,Cu)2Si4 is suggested.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2019-05-16T17:22:05Z
2019-10-24T15:07:38Z