Uniaxial Low-Cycle Fatigue Study of Alloy 800H Weldments at 700 °C

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dc.contributor.authorDewa, Rando Tungga
dc.contributor.authorKim, Seon.Jin
dc.contributor.authorKim, Woo-Gon
dc.contributor.authorKim, Eung-Seon
dc.date.accessioned2022-03-07T11:00:25Z
dc.date.available2022-03-07T11:00:25Z
dc.date.issued2018
dc.description.abstract-translatedAlloy 800H is currently under consideration to be used in a very high temperature reactor system. This paper describes the experimental low-cycle fatigue study on Alloy 800H base metal and weldments in the air with fully-reversed strain control at 700 degrees C. The recommended modern Alloy 800H weldments were fabricated by gas tungsten arc welding. The observed fatigue life is found to be comparable between base metal and weldments at this temperature, indicating the welding technique can compete with base material. The influence of hold time was further investigated at the maximum tensile strain of 0.6% total strain range condition for 60 s, and it is found to reduce the fatigue life. For most of the tests, the base metal revealed an initial cyclic hardening stress response, otherwise, the weldment was entirely softened with cycles. The addition of hold time is also found to induce an unequal cyclic stress response in both materials. Accordingly, for continuous low-cycle fatigue tests, fatigue cracks were initiated and propagated in a classical transgranular fracture mode. However, the hold time affected the mixed-mode fracture mode by means of a transition from transgranular to intergranular fractureen
dc.format16 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationDEWA, RT. KIM, S. KIM, W. KIM, E. Uniaxial Low-Cycle Fatigue Study of Alloy 800H Weldments at 700 °C. Metals, 2018, roč. 8, č. 11, s. nestránkováno. ISSN: 2075-4701cs
dc.identifier.document-number451735100057
dc.identifier.doi10.3390/met8110918
dc.identifier.issn2075-4701
dc.identifier.obd43935134
dc.identifier.uri2-s2.0-85056360477
dc.identifier.urihttp://hdl.handle.net/11025/47104
dc.language.isoenen
dc.publisherMDPIen
dc.relation.ispartofseriesMetalsen
dc.rights© authorsen
dc.rights.accessopenAccessen
dc.subject.translatedAlloy 800Hen
dc.subject.translatedlow-cycle fatigueen
dc.subject.translatedweldmentsen
dc.subject.translatedvery high temperature reactoren
dc.titleUniaxial Low-Cycle Fatigue Study of Alloy 800H Weldments at 700 °Cen
dc.typečlánekcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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