Key Laboratory of LCR Materials and Devices of Yunnan Province;
National Center for International Research on Photoelectric and Energy Materials;
School of Materials and Energy;
Yunnan University;
Kunming 650091;
China;
Collaborative Innovation Center of Renewable Energy Materials and Department of Physics;
Guangxi University;
Nanning 530004;
China;
Center for High-Resolution Electron Microscopy;
College of Materials Science and Engineering;
Hunan University;
Changsha 410082;
China;
Al alloy; Strengthening mechanism; Phase transition; Transmission electron microscopy;