一种第四代镍基单晶高温合金的同相位热机械疲劳行为及损伤机制

谭子昊, 李永梅, 王新广, 赵浩川, 谭海兵, 王标, 李金国, 周亦胄, 孙晓峰

In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy

TAN Zihao, LI Yongmei, WANG Xinguang, ZHAO Haochuan, TAN Haibing, WANG Biao, LI Jinguo, ZHOU Yizhou, SUN Xiaofeng

图7 DD91合金在不同应变幅下IP-TMF失效断裂后的表面裂纹形貌及对应的反极图(IPF)、局部取向差(KAM)和晶内参考取向差(GROD)图

Fig.7 Surface crack morphologies (a1-d1) and corresponding inverse pole figures (IPFs) (a2-d2), kernel average misorientation (KAM) maps (a3-d3), and grain reference orientation deviation (GROD) maps (a4-d4) of DD91 alloy after IP-TMF fracture at strain amplitudes of 0.5% (a1-a4), 0.6% (b1-b4), 0.8% (c1-c4), and 0.9% (d1-d4)