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High-Cycle Fatigue Behaviour of Pure Tantalum under Multiaxial and Variable Amplitude Loadings

hal.structure.identifierCentre d'études scientifiques et techniques d'Aquitaine (CESTA-CEA) [CESTA]
dc.contributor.authorMARECHAL, David
dc.contributor.authorSAINTIER, Nicolas
dc.contributor.authorPALIN LUC, Thierry
IDREF: 136498752
hal.structure.identifierCentre d'études scientifiques et techniques d'Aquitaine (CESTA-CEA) [CESTA]
dc.contributor.authorNADAL, François
dc.date.accessioned2021-05-14T10:00:39Z
dc.date.available2021-05-14T10:00:39Z
dc.date.issued2014
dc.identifier.issn1022-6680
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/78147
dc.descriptionDue to its specific mechanical properties, tantalum is often used in strength-demandingmilitary applications. High-cycle fatigue (HCF) behaviour of pure tantalum, however, has been rarely reported and the mechanisms at stake to account for deformation under cyclic loadings are still badly understood. This paper aims at better understanding the fatigue behaviour of tantalum and at clarifying the mechanisms of damage formation encountered under such loadings. HCF experiments performed at room temperature on commercially-pure tantalum are presented. Mean stress effects were investigated in the aim of clarifying the interaction between fatigue and creep. Fracture mechanisms were observed to vary from intergranular to transgranular depending on applied stress amplitude and mean stress. Damage mechanisms were investigated under tension and torsion. Results are analyzed in the light of existing fatigue criteria, the limitations of which are discussed. Finally, complex sequential loadings, representative of in-service loadings, were applied to tantalum smooth specimens. The contribution of each loading sequence to the overall damage was quantified and analyzed in terms of linear or non-linear cumulative damage rule
dc.description.abstractEnDue to its specific mechanical properties, tantalum is often used in strength-demandingmilitary applications. High-cycle fatigue (HCF) behaviour of pure tantalum, however, has been rarely reported and the mechanisms at stake to account for deformation under cyclic loadings are still badly understood. This paper aims at better understanding the fatigue behaviour of tantalum and at clarifying the mechanisms of damage formation encountered under such loadings. HCF experiments performed at room temperature on commercially-pure tantalum are presented. Mean stress effects were investigated in the aim of clarifying the interaction between fatigue and creep. Fracture mechanisms were observed to vary from intergranular to transgranular depending on applied stress amplitude and mean stress. Damage mechanisms were investigated under tension and torsion. Results are analyzed in the light of existing fatigue criteria, the limitations of which are discussed. Finally, complex sequential loadings, representative of in-service loadings, were applied to tantalum smooth specimens. The contribution of each loading sequence to the overall damage was quantified and analyzed in terms of linear or non-linear cumulative damage rule
dc.language.isoen
dc.publisherTrans Tech Publications
dc.subject.enCumulative Damage
dc.subject.enTantalum
dc.subject.enVariable Amplitude Loading
dc.subject.enHigh Cycle Fatigue (HCF)
dc.subject.enFatigue-Creep Interaction
dc.title.enHigh-Cycle Fatigue Behaviour of Pure Tantalum under Multiaxial and Variable Amplitude Loadings
dc.typeArticle de revue
dc.identifier.doi10.4028/www.scientific.net/AMR.891-892.1341
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des matériaux [physics.class-ph]
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des solides [physics.class-ph]
bordeaux.journalAdvanced Materials Research
bordeaux.page1341-1346
bordeaux.volume891-892
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-01057955
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01057955v1
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