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Gouvernement du Canada / Government of Canada

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Elevated temperature fatigue-creep behavior of nickel-base superalloy IN 625

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1520/STP24499S
AuteurRechercher : ; Rechercher : ; Rechercher : ; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada
FormatTexte, Chapitre de livre
Sujetcontinuous cycling; fatigue-creep; tension/compression hold time; Inconel 625
Résumé
A research program has been carried out to establish the low-cycle fatigue and creep-fatigue behaviors of Inconel 625 at elevated temperatures (650 and 815°C). The main observations were related to the effect of temperature and of hold times. Under continuous cycling, a temperature increase from 650 to 815°C caused a reduction in the fatigue life by a factor of 2 at a high strain and by a factor of 3 at a low strain. Tension hold times had little detrimental effect on cyclic life at 650°C concerning the life reduction with respect to continuous cycling; at 815°C, on the other hand, this became more significant. Compressive hold times also had a damaging effect on fatigue life, and this was larger than that associated with tensile hold times; in particular, it was very pronounced for low strain levels at 815°C. An analysis of data using a life prediction method previously suggested for creep-fatigue combination loadings has also been carried out. The method takes into account the damaging effect due to a compression hold time separately from that due to a tensile hold time in interspersed creep-fatigue loadings. The overall correlation between theoretical calculations and experimental results is reasonably good, for strain levels ranging from 1.2 to 0.4%.
Date de publication
Maison d’éditionASTM International
Dans
  • Low Cycle Fatigue : 470–484.
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCCNRC 24397
NRC-IGM86-203-216
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Identificateur de l’enregistrementc8ed94de-58d3-4c33-943c-0e81d46a415f
Enregistrement créé2019-11-06
Enregistrement modifié2020-06-10
Date de modification :