Strain accumulation during microstructurally small fatigue crack propagation in bcc Fe-Cr ferritic stainless steel

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Malitckii, E. Remes, H. Lehto, P. Yagodzinskyy, Y. Bossuyt, S. Hänninen, H. 2017-11-21T13:36:36Z 2017-11-21T13:36:36Z 2018-02-01
dc.identifier.citation Malitckii , E , Remes , H , Lehto , P , Yagodzinskyy , Y , Bossuyt , S & Hänninen , H 2018 , ' Strain accumulation during microstructurally small fatigue crack propagation in bcc Fe-Cr ferritic stainless steel ' Acta Materialia , vol 144 , pp. 51-59 . DOI: 10.1016/j.actamat.2017.10.038 en
dc.identifier.issn 1359-6454
dc.identifier.issn 1873-2453
dc.identifier.other PURE UUID: 67ef7b3c-d887-4dc6-a89e-3cc8264407eb
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract Strain accumulation was studied by digital image correlation technique (DIC) during microstructurally small fatigue crack propagation in polycrystalline 18%Cr ferritic stainless steel. Load-controlled fatigue testing was performed with R-ratio of 0.1 and frequency 10 Hz. The maximum applied stress was well below the yield stress of the studied material. The effect of the observed strain field on crack growth rate variation is discussed. Fracture surfaces were studied by scanning electron microscopy (SEM) evidencing the connection between the mechanism of the fatigue crack growth, accumulated strain and crack growth rate. Detailed study of fracture surface morphology was carried out by atomic force microscopy (AFM). Results indicate two processes of material damage accumulation and failure during cyclic loading: 1) local shear strain zones form successively ahead of the crack tip, and 2) fatigue crack growth occurs by both single- and multiple-slip mechanisms. The place and intensity of shear strain localization zones vary during the crack growth that is related closely to the local variation of crack growth rate. en
dc.format.extent 9
dc.format.extent 51-59
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Acta Materialia en
dc.relation.ispartofseries Volume 144 en
dc.rights openAccess en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other Ceramics and Composites en
dc.subject.other Polymers and Plastics en
dc.subject.other Metals and Alloys en
dc.subject.other 214 Mechanical engineering en
dc.subject.other 216 Materials engineering en
dc.title Strain accumulation during microstructurally small fatigue crack propagation in bcc Fe-Cr ferritic stainless steel en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Mechanical Engineering
dc.subject.keyword bcc crystal structure
dc.subject.keyword Digital image correlation
dc.subject.keyword Microstructurally small fatigue crack
dc.subject.keyword Shear strain localization
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword Ceramics and Composites
dc.subject.keyword Polymers and Plastics
dc.subject.keyword Metals and Alloys
dc.subject.keyword 214 Mechanical engineering
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201711217625
dc.identifier.doi 10.1016/j.actamat.2017.10.038
dc.type.version publishedVersion

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