两种高代次镍基单晶高温合金热机械疲劳中的再结晶行为

赵鹏, 谢光, 段慧超, 张健, 杜奎

Recrystallization During Thermo-Mechanical Fatigue of Two High-Generation Ni-Based Single Crystal Superalloys

ZHAO Peng, XIE Guang, DUAN Huichao, ZHANG Jian, DU Kui

图1 断口形貌、变形样品的孪晶片层及断裂样品断口区域微观结构(第三代单晶高温合金)

Fig.1 Fractography and deformation bands of sample (The third-generation single crystal superalloy) (a) fracture surface morphology and deformation bands with one type of {111} active plane (The dotted area indicates the sample of SEM and TEM location) (b) back scattered electron (BSE) image of the deformed samples showing twin lamellae (Two different twin planes are shown by twin plane A and twin plane B) (c, d) secondary electron (SE) images showing the microstructure of fracture sample