This paper studied the creep rupture behavior of Hastelloy C276-BNi2 brazed joint by experimental. Based on a series of creep rupture tests at 600 °C under 110–250 MPa, a relation between the stress and rupture time was achieved to evaluate the creep life of brazed joint. The results show that all the brazed joints were fractured in brazed seam immediately after the second creep stage. The creep model, fracture behavior and failure mechanism are dependent on the level of applied stress. The creep behavior of the brazed joint should be depicted by two-regime Norton (2RN) creep model rather than single Norton model. The creep damage tolerance factor was used to identify the cause of creep damage. From low to high stress level, the failure mode is changed from intergranular brittle to transgranular ductile fracture due to the increases of damage tolerance factor with applied stress increases.

本文通过实验研究了哈氏合金C276-BNi2钎焊接头的蠕变断裂行为。基于在110–250 MPa下在600°C下进行的一系列蠕变断裂试验，得出了应力与断裂时间之间的关系，以评估钎焊接头的蠕变寿命。结果表明，所有的钎焊接头在第二蠕变阶段后立即在钎焊缝中断裂。蠕变模型，断裂行为和破坏机理取决于所施加的应力水平。钎焊接头的蠕变行为应通过两态诺顿（2RN）蠕变模型而不是单诺顿模型来描述。使用蠕变损伤容限因子来确定蠕变损伤的原因。从低到高的压力水平，