The method for the determination of creep cavitation model based on cavity histogram

Metallic structures operating at high temperatures can have creep as a life-limiting mechanism. The limit can arise by nucleation and growth of creep cavities that eventually merge becoming the leading damage of the fracture mechanisms. Understanding and modelling for creep cavitation can therefore help in prediction of structural safety and condition of such structures. The present paper will introduce a new model to predict creep cavitation damage so that the associated creep strain is also modelled out of the predictive expression without losing accuracy in the time to critical damage and corresponding residual life. The model was verified for OFHC copper, low-alloy 0.5CMV steel and higher-alloy X20 steel, to cover a wide range of polycrystalline metals and their microstructures. The new model performed as well as or better than the classical approach which requires access to measured strain. The model was applied to predict creep cavitation damage from time, stress and temperature as predictive variables.

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The method for the determination of creep cavitation model based on cavity histogram

Abstract: All times shown are London winter times COFFEE BREAK 0900 -0915h 5 SESSION 2: INSPECTION

Cited by 4 publications

References 18 publications

The Development and Application of Optimisation Technique for the Calibrating of Creep Cavitation Model Based on Cavity Histogram

The Development and Application of Optimisation Technique for the Calibrating of Creep Cavitation Model Based on Cavity Histogram

High-temperature creep life prediction of 9%Cr steel based on creep cavitation modelling

Modelling for Creep Cavitation Damage and Life of Three Metallic Materials

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