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Abstract
In components subjected to uneven stresses at high steam temperatures, creep deformation leads to stress redistribution. Calculation procedures available hitherto have overestimated the amount of stress relaxation which will occur, but the present work has shown that compensation for the effect of creep recovery can give precise prediction of laboratory creep-relaxation test results. To facilitate these calculations, flexible methods of describing creep and creep-recovery data have been evolved, and the creep-recovery process in a 1Cr–Mo–V rotor steel has been quantified using stress-decrement tests. The creep-recovery data obtained were compatible with published data from other steels at various temperatures.