Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology;
College of Energy and Power Engineering;
Nanjing University of Aeronautics and Astronautics;
Nanjing 210016;
China;
AML;
Department of Engineering Mechanics;
Tsinghua University;
Beijing 100084;
China;
AMPTL;
Department of Mechanical Engineering;
Tsinghua University;
Beijing 100084;
China;
Sino-French Institute of Nuclear Engineering and Technology;
Sun Yat-Sen University;
Zhuhai 519082;
China;
Crack growth rate; Fretting fatigue; In-situ observation; J-integral; 1045 steel;