School of Materials Science and Engineering;
Harbin Institute of Technology;
Harbin 150001;
China;
Center for Analysis;
Measurement and Computing;
Harbin Institute of Technology;
Harbin 150001;
China;
School of Materials Science and Engineering;
Harbin University of Science and Technology;
Harbin 150080;
China;
School of Materials Science and Engineering;
Fuzhou University;
Fuzhou 350116;
China;
Gradient structure; Heterogeneous lamella structure; Digital image correlation; Strain partition;