Creep properties at ambient temperature of some high strength steels

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dc.contributor.authorPollock, JTAen_AU
dc.contributor.authorBarton, SGen_AU
dc.date.accessioned2007-11-22T04:27:38Zen_AU
dc.date.accessioned2010-04-30T04:38:33Zen_AU
dc.date.available2007-11-22T04:27:38Zen_AU
dc.date.available2010-04-30T04:38:33Zen_AU
dc.date.issued1979-03en_AU
dc.description.abstractAmbient temperature stress relaxation and creep data are reported at various stress levels for two grades of MAR300 steel, a MAR350 steel and a type 301 stainless steel. Analysis has shown that there is a linear relationship between the logarithm of time and relaxed stress, or creep strain. On the basis of this linear relationship, two parameters are calculated that are characteristic of the relaxation and creep behaviour at a given stress level. Using a conjugate relationship suggested by Felthat [1961 - Phil. Mat., 6:259; J. Inst. Met., 89:201], these characteristic parameters are compared to allow an assessment to be made of the possibility of deriving constant load creep characteristics from short-term stress relaxation data. Because of the difficulties in measuring some of the factors in this relationship, a large error band is associated with the derivation at stresses where the work hardening rate is very high. Nevertheless, in this difficult stress range, a working relationship is demonstrated which is sufficient to warrant the application of the approach if design information is required. At stresses in the range 1000-1500 N mm-2, creep increments per year of about 10-4 mm mm-1 were calculated from the experimental data for the maraging steels. In terms of creep increment per year, the type 301 stainless steel is roughly an order of magnitude inferior to the maraging steels over the same range of stress. At higher stresses in the range 1600-2150 N mm-2, which is beyond the applicability of the MAR300 steels or the type 301 stainless steel, an unchanged yearly creep increment of ~10-4 mm mm-1 was obtained with the MAR350 steel.en_AU
dc.identifier.citationPollock, J. T. A., & Barton, S. G. (1979). The creep properties at ambient temperature of some high strength steels (AAAEC/E462). Lucas Heights, N.S.W.: Research Establishment, Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc685en_AU
dc.identifier.isbn0642596654en_AU
dc.identifier.otherAAEC-E-462en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/675en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectCreepen_AU
dc.subjectStress relaxationen_AU
dc.subjectGas centrifugesen_AU
dc.subjectStainless steel-301en_AU
dc.titleCreep properties at ambient temperature of some high strength steelsen_AU
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