School of Materials Science and Engineering;
Harbin Institute of Technology;
Harbin 150001;
China;
China-Ukraine Institute of Welding;
Guangdong Academy of Sciences;
Guangzhou 510651;
China;
School of Aerospace;
Mechanical and Mechatronic Engineering;
and Australian Centre for Microscopy and Microanalysis;
The University of Sydney;
New South Wales 2006;
Australia;
School of Materials Science and Engineering;
Harbin Institute of Technology(Shenzhen);
Shenzhen 518055;
China;
Al alloys; Isothermal ageing; Microhardness; Transmission electron microscopy; Atom probe tomography; First-principles calculations;