This study discusses a method for the evaluation of multiaxial creep remaining life of a Mod.9Cr-1Mo steel and SUS304 steel based on the creep life of samples obtained from components subjected to multiaxial creep damage. Experimental multiaxial creep tests were carried out to demonstrate whether the remaining life can be evaluated with the linear cumulative damage rule even for multiaxial creep damaged material. Equi-biaxial tensile creep tests were carried out using a cruciform specimen up to half of time to rupture. Subsequently, miniature specimens were cut out from the specimens, and a uniaxial creep test was performed. The results suggested that the linear cumulative damage rule is not suitable for the evaluation of remaining life of component which underwent multiaxial creep damage.
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