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本文研究了蠕变断裂韧性δ_(cc)对蠕变和蠕变-疲劳交互作用下裂纹开裂和扩展的影响.并进行了在不同δ_(cc)情况下光滑和缺口持久强度试验.文中指出:高过零件断裂寿命取决于缺口尖端处应力场和蠕变断裂韧性两方面的因素,所以在高温零件断裂寿命估算中.则应同时计及持久强度和蠕变断裂韧性.
In this paper, the effect of creep fracture toughness δ_ (cc) on cracking and propagation of cracks under the interaction of creep and creep-fatigue is studied, and the test of smooth and notched strength under different δ_c is carried out. The fracture life higher than the part depends on the stress field at the notch tip and the creep fracture toughness, so in the estimation of the fracture life of hot parts, the long-term strength and creep fracture toughness should also be taken into account.