Al–Zn–Mg–Cu alloys; Heterogeneous microstructure; High formability; Al-Zn-Mg-Cu alloy; Coupling controls; Gradient distributions; Heterogeneous structures; Iron rich; Micro-domains; Rich phase; Solute gradients; Materials Science (all); Condensed Matter Physics; Mechanics of Materials; Mechanical Engineering; General Materials Science
Abstract :
[en] Here we report a heterogeneous microstructure in Al–Zn–Mg–Cu alloys by coupling control of solute gradient distribution, multiscale iron-rich phases and a novel thermomechanical processing that can produce a greatly improved formability (the average plastic strain ratio r = 0.719). A heterogeneous structure of coarse grains surrounded by fine grains is formed, and an unusual high formability is obtained by the synergy of soft/hard microdomains. The process discovered here is amenable to large-scale automotive industrial production at low cost, and might be applicable to other Al alloy systems.
Disciplines :
Materials science & engineering
Author, co-author :
Yuan, Liangliang; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, China
Guo, Mingxing; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, China ; Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing, China
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département Argenco : Secteur MS2F
Duchene, Laurent ; Université de Liège - ULiège > Département ArGEnCo > Analyse multi-échelles dans le domaine des matériaux et structures du génie civil
Zhuang, Linzhong; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, China ; Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing, China
Language :
English
Title :
Extremely improved formability of Al–Zn–Mg–Cu alloys via micro-domain heterogeneous structure
Publication date :
14 March 2022
Journal title :
Materials Science and Engineering: A: Structural Materials: Properties, Microstructures and Processing
This work was supported by the National Key Research and Development Program of China (No. 2021YFE0115900 ), National Natural Science Foundation of China (Nos. 51871029 , 51571023 and 51301016 ), Government Guided Program-Intergovernmental Bilateral Innovation Cooperation Project (No. BZ2019019 ), the Opening Project of State Key Lab of Advanced Metals and Materials (No. 2020-ZD02 ).
Commentary :
Collaboration lors des contacts pour établir un projet commun. Abandon de cette collaboration par la suite vu la politique Dual Use
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