GH4169高温合金热机械疲劳循环损伤机理及数值模拟

张禄, 余志伟, 张磊成, 江荣, 宋迎东

Thermo-Mechanical Fatigue Cycle Damage Mechanism and Numerical Simulation of GH4169 Superalloy

ZHANG Lu, YU Zhiwei, ZHANG Leicheng, JIANG Rong, SONG Yingdong

表1 GH4169高温合金不同温度下的Chaboche黏塑性模型参数[35,48]

Table 1 Parameters of the Chaboche viscoplastic model for GH4169 superalloy at different temperatures[35,48]

T / oC C1 / MPa C2 / MPa γ1 γ2 E / MPa Z / MPa[35] σy0 / MPa n[35] b[35] Q / MPa A / s-1 nc[48] 300 131241 84084 291 186 159200 941 573 3.6 15.51 -250 8.23exp(-22) 5.77 550 142188 91956 342 266 152600 902 559 3.9 13.86 -320 650 138105 100450 345 305 145900 893 518 4.0 13.20 -380