The effect of interacting small defects on the fatigue limit of a medium carbon steel

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Åman, Mari Okazaki, Saburo Matsunaga, Hisao Marquis, Gary B. Remes, Heikki
dc.contributor.editor Iacoviello, F
dc.contributor.editor Susmel, L
dc.contributor.editor Firrao, D
dc.contributor.editor Ferro, G 2017-01-19T11:03:05Z 2016
dc.identifier.citation Åman , M , Okazaki , S , Matsunaga , H , Marquis , G B & Remes , H 2016 , The effect of interacting small defects on the fatigue limit of a medium carbon steel . in F Iacoviello , L Susmel , D Firrao & G Ferro (eds) , 21ST EUROPEAN CONFERENCE ON FRACTURE, (ECF21) . Procedia Structural Integrity , vol. 2 , Elsevier Science B.V. , pp. 3322-3329 , European Conference on Fracture , Catania , Italy , 20-24 June . DOI: 10.1016/j.prostr.2016.06.414 en
dc.identifier.issn 2452-3216
dc.identifier.other PURE UUID: 4766f1e1-8af8-492c-9f2f-bfd3286d47d2
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE FILEURL:
dc.description.abstract Structural steels contain various material irregularities and natural defects. These cause local stress concentrations, from which fatigue cracks tend to initiate. Two defects in close proximity to each other may affect local stress distributions and thus, begin to interact. In this paper, the effect of interacting small cracks on the fatigue limit is systematically investigated in a medium carbon steel. The growth of interacting cracks, as well as the characteristics of non-propagating cracks and microstructural aspects were closely examined via the plastic replica method. It was found that although the fatigue limit is essentially controlled by the mechanics of interacting cracks, based on their configuration, the local microstructure comprised of ferrite and pearlite has a statistical scatter effect on the behaviour of interacting cracks and non-propagating thresholds. With respect to the fatigue limit, when two defects were in close proximity, they behaved as would a larger single defect. However, with greater spacing between defects, rather than mechanical factors, it is the local microstructure which determines the location and characteristics of non propagating cracks. Copyright (C) 2016 The Authors. Published by Elsevier B.V. en
dc.format.extent 8
dc.format.extent 3322-3329
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartof European Conference on Fracture en
dc.relation.ispartofseries 21ST EUROPEAN CONFERENCE ON FRACTURE, (ECF21) en
dc.relation.ispartofseries Procedia Structural Integrity en
dc.relation.ispartofseries Volume 2 en
dc.rights openAccess en
dc.subject.other 216 Materials engineering en
dc.title The effect of interacting small defects on the fatigue limit of a medium carbon steel en
dc.type A4 Artikkeli konferenssijulkaisussa fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Mechanics
dc.contributor.department Kyushu University
dc.contributor.department Department of Mechanical Engineering en
dc.subject.keyword small crack
dc.subject.keyword interacting cracks
dc.subject.keyword interaction effect
dc.subject.keyword fatigue limit
dc.subject.keyword medium carbon steel
dc.subject.keyword non-propagating crack
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201701191152
dc.identifier.doi 10.1016/j.prostr.2016.06.414

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