热力耦合对一种第四代镍基单晶高温合金1100℃蠕变组织演变的影响

徐静辉, 李龙飞, 刘心刚, 李辉, 冯强

Thermal-Stress Coupling Effect on Microstructure Evolution of a Fourth-Generation Nickel-Based Single-Crystal Superalloy at 1100oC

XU Jinghui, LI Longfei, LIU Xingang, LI Hui, FENG Qiang

表1 镍基单晶高温合金在不同热力耦合条件下的显微组织参数定量统计

Table 1 Quantitative statistics of microstructure parameters of the nickel-based single-crystal superalloy after various thermal-stress coupling conditions

Specimen Vf / % Ω D / nm W / nm SHT 68.0±1.3 0 356±18 57±11 VSC 43 MPa, 200 h 58.5±1.7 0.284±0.061 518±15 442±45 VSC 54 MPa, 200 h 57.9±0.8 0.334±0.048 512±26 453±25 VSC 71 MPa, 200 h 56.7±1.4 0.518±0.032 484±35 481±32 VSC 96 MPa, 200 h 55.9±1.5 0.602±0.053 458±28 488±21 Creep rupture 130 MPa, 231 h 49.7±1.1 0.403±0.037 365±46 583±33