镍基高温合金疲劳裂纹急速扩展敏感温度及成因

江河, 佴启亮, 徐超, 赵晓, 姚志浩, 董建新

Sensitive Temperature and Reason of Rapid Fatigue Crack Propagation in Nickel-Based Superalloy

JIANG He, NAI Qiliang, XU Chao, ZHAO Xiao, YAO Zhihao, DONG Jianxin

表1 实验用典型镍基高温合金的化学成分 (mass fraction / %)

Table 1 Chemical compositions of nickel-based superalloy used in present work

Superalloy C Cr Mo W Al Ti Co Nb Zr B Hf Fe Si Ni FGH4096 0.035 16.00 4.00 4.00 2.10 3.70 13.00 0.70 0.033 0.011 - - - Bal. FGH4097 0.045 9.02 3.76 4.96 4.91 1.74 15.69 2.59 0.017 0.012 0.30 - - Bal. FGH4098 0.054 12.65 3.83 2.18 3.45 3.70 20.20 0.90 0.050 0.021 - - - Bal. GH4738 0.037 19.05 4.40 - 1.35 2.90 14.20 - 0.050 0.005 - 0.18 0.07 Bal. GH4720Li 0.012 15.17 3.00 1.30 2.42 4.85 14.70 - 0.030 0.012 - - - Bal.