Abstract:Creep damage behavior and creep crack propagation behavior at high temperatures were investigated. The expressions of the resistance to creep damage, stress intensity factor threshold and initiation time were obtained under given conditions. The range of applicability of the characterizing parameter for creep crack growth was analysed by using resistance to creep damage of material. The influence of temperature on stress intensity factor threshold and creep crack growth rate was analysed. Expressions for creep crack growth rate were presented.

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