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2 镍基单晶高温合金经不同热力耦合条件后的γ/γ'两相晶格常数和错配度

Table 2 Changing of γ/γ' lattice parameter and misfit of the nickel-based single-crystal superalloy after various thermal-stress coupling conditions

Specimen aγ aγ' δ SHT 0.3576 0.3568 -0.22 43 MPa 0.3583 0.3573 -0.26 54 MPa 0.3589 0.3577 -0.33 71 MPa 0.3596 0.3582 -0.37 96 MPa 0.3608 0.3589 -0.42