Keywords Fracture surface analysis;Fatiure analysis;Site of the ergin of orack;Direcuon of the propagation of crack;Fatigue striation;Fatigue failure of hot corrosion;

• 断口分析;失效分析;裂源位置;裂纹扩展方向;疲劳浑叹;热腐蚀疲劳;