Abstract
AbstractTo simulate generation ofcavities in fossil-fired power plants, uniaxial creep tests have been performed on virgin and service-exposed 1Cr-O.5Mo steel. The cavity formation was studied in interrupted creep tests using a replica technique. The rate ofcreep cavity formation increased with increasing time, the rate being higher for service-exposed material than for new material. At a value of 0.1% cavity area fraction 30–70% ofthe creep life remained. If this is representative ofactual conditions it would give a sufficiently early warning of creep damage for avoiding failure.
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