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Lifetime prediction in high temperature component.
Lebensdauervorhersage für Hochtemperatur-Bauteile
This review considers the research work performed by the participants in the Lifetime Prediction Coordination Group of COST 501, Round I. Their results and findings are discussed in the context of present day mechanistic understanding and engineering needs. In the main the review deals with the behaviour of Alloy 800H, a complex austenitic steel, used mostly for high temperature heat exchange and process industry reaction tubes, but reference to work conducted on other power engineering alloys is included where relevant. The various chapters have been prepared by some of the experts involved. They cover such aspects as the behaviour under uniaxial and multiaxial creep, fatigue and the effect on the microstructure of mechanical loading and thermal treatment; the use of fracture mechanics approaches to describe crack growth; the determination of residual life by nondestructive and destructive examination. The review provides an important source of evaluated data for the behaviourof Allo y 800H.