Objective
In order to explore the validity of creep strength reduction factors and the creep crack growth behaviour in welds of real components, creep tests were performed at 600C on large specimens made of 316L(N) stainless steel plates or 316L tubes. Manual metal arc (MMA) welds as well as tungsten inert gas (TIG) welds were investigated. In some specimens defects were machined by spark erosion. The overall deformation of the specimens and in many instances the local deformations of the welds were recorded. The evolutions of the defects were followed by potential drop techniques. The experimental results were compared with 2-dimensional and in some instances 3-dimensional finite element computations, based on the creep behaviour of the base and weld metals, determined with small standard specimens. The time to creep crack growth initiation was correlated with the C* parameter determined from the load displacement rate. The results obtained on the undefected welds were compared to predictions from design codes and from other possible simplified methods. The times to initiation of creep crack growth were compared with evaluations using Regles de conception et de construction des composants mecaniques des reacteurs a neutrons rapides (RCC - MR) code and R5 rules as well as with other methods, in particular those derived from finite element analysis.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Coordinator
75015 PARIS
France
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