Shi-changxu Innovation Center for Advanced Materials;
Superalloys Division;
Institute of Metal Research;
Chinese Academy of Sciences;
Shenyang 110016;
China;
School of Materials Science and Engineering;
University of Science and Technology of China;
Shenyang 110016;
China;
Ni-based superalloys; Ta/Al ratio; High temperature creep; Interfacial dislocation networks; γ'rafting;