State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry, ChineseAcademy of Sciences;
School of Materials Science and Engineering, Changchun University of Science and Technology;
University of Sciences and Technology of China;
Aerospace Research Institute of Materials and Processing Technology;
Transmission; electron; microscopy; Phase; transformation; Intermetallic; phase; Twin; boundary; Orientation; relationship;