Correlation of the high and very high cycle fatigue response of ferrite based steels with strain rate-temperature conditions
dc.contributor.author | TORABIAN, Noushin |
dc.contributor.author | DIRRENBERGER, Justin |
dc.contributor.author | ADAMSKI, Frédéric |
dc.contributor.author | ZIAEI-RAD, Saeed |
dc.contributor.author
hal.structure.identifier | RANC, Nicolas
|
dc.contributor.author | FAVIER, Véronique |
dc.date.accessioned | 2017 |
dc.date.available | 2017 |
dc.date.issued | 2017 |
dc.date.submitted | 2017 |
dc.identifier.issn | 1359-6454 |
dc.identifier.uri | http://hdl.handle.net/10985/12039 |
dc.description.abstract | The discrepancies observed between conventional and ultrasonic fatigue testing are assessed through the mechanisms of dislocation mobility in BCC metals. The existence of a transition condition between thermally-activated and athermal regimes for screw dislocation mobility is studied under fatigue loading based on infrared thermography and microstructural characterization, here in the case of DP600 dual-phase steel. Evidence is obtained regarding the microstructural sources of crack initiation, which is found to be consistent with the existence of a transition in the modes of deformation. From the analysis of the experimental data gathered in this work, guidelines are given regarding the comparison and interpretation of S-N curves obtained from conventional and ultrasonic fatigue testing. The inevitable temperature increases under ultrasonic fatigue at high stress amplitudes along with the rate dependent deformation behavior of ferrite, as a BCC structure, were found as the key parameters explaining the observed fatigue behavior and thermal response under low and ultrasonic frequencies. A transition map was produced using the experimental results for DP600 steel as well as data available in the literature for other ferrite based steels, showing the correlation between thermally-activated screw dislocation movement and the absence of failure in very high cycle fatigue. |
dc.language.iso | en |
dc.publisher | Elsevier |
dc.rights | Post-print |
dc.subject | very high cycle fatigue |
dc.subject | frequency effect |
dc.subject | dual-phase steel |
dc.subject | strain rate sensitivity |
dc.subject | thermally activated processes |
dc.title | Correlation of the high and very high cycle fatigue response of ferrite based steels with strain rate-temperature conditions |
ensam.embargo.terms | 2017-11-30 |
dc.identifier.doi | 10.1016/j.actamat.2017.05.064 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Sciences de l'ingénieur: Matériaux |
dc.subject.hal | Sciences de l'ingénieur: Mécanique |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Matériaux et structures en mécanique |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des matériaux |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des solides |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des structures |
ensam.audience | Non spécifiée |
ensam.page | 40-52 |
ensam.journal | Acta Materialia |
ensam.volume | 134 |
ensam.peerReviewing | Oui |
hal.identifier | hal-01592775 |
hal.version | 1 |
hal.submission.permitted | updateMetadata |
hal.status | accept |