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Secondary Phases Quantification and Fracture Toughness at Cryogenic Temperature of Austenitic Stainless Steel Welds for High-Field Superconducting Magnets

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dc.affiliation.dptoUC3M. Departamento de Mecánica de Medios Continuos y Teoría de Estructurases
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Nonlinear Solid Mechanicses
dc.contributor.authorAvilés Santillana, Ignacio
dc.contributor.authorFernández Pisón, María del Pilar
dc.contributor.authorLangeslag, Stefanie
dc.contributor.authorSgobba, Stefano
dc.contributor.authorLunt, Alexander
dc.contributor.authorBoyer, Christelle
dc.contributor.authorRuiz Navas, Elisa María
dc.date.accessioned2022-09-15T07:55:49Z
dc.date.available2022-09-15T07:55:49Z
dc.date.issued2018-02-26
dc.description.abstractThe ITER magnet system is based on the "cable-inconduit" conductor concept, which consists of various types of stainless steel jackets filled with superconducting strands. The jackets provide high strength and fracture toughness to counteract the high stress imposed by, amongst others, electromagnetic loads at cryogenic temperature. Material properties of austenitic stainless steel at cryogenic temperature are known to some extent, but only partial information is available for their welds, particularly in combination with weld fillers envisaged for cryogenic service. When a full inspection of the welded components is not possible, it becomes of special interest an assessment of its fracture toughness under close-to-service conditions if a fracture mechanics' design approach is to be adopted. In absence of defects, brittle secondary phases are generally held responsible of the loss of ductility and toughness which is to be expected after postweld heat treatments. Their quantification becomes thus essential in order to explain the negative impact in fracture toughness after unavoidable thermal treatments. This paper investigates fracture toughness behavior at 7 K of AISI 316L and AISI 316LN tungsten inert gas welds using two fillers adapted to cryogenic service, EN 1.4453 and JK2LB. Additionally, the effect of such an aforementioned heat treatment, here the Nb3Sn reaction heat treatment (650 degrees for 200 h) on fracture toughness of the welds is evaluated. A correlation between the evolution of properties and the quantity of secondary phases as a result of the above treatment is provided.en
dc.format.extent6
dc.identifier.bibliographicCitationSantillana, I. A., Pison, P. F., Langeslag, S. A. E., Sgobba, S., Lunt, A., Boyer, C., & Navas, E. M. R. (2018). Secondary Phases Quantification and Fracture Toughness at Cryogenic Temperature of Austenitic Stainless Steel Welds for High-Field Superconducting Magnets. IEEE Transactions on Applied Superconductivity, 28(4), 1–4.en
dc.identifier.doihttps://doi.org/10.1109/TASC.2018.2809481
dc.identifier.issn1051-8223
dc.identifier.urihttps://hdl.handle.net/10016/35432
dc.identifier.uxxiAR/0000021368
dc.language.isoeng
dc.rights© 2018 IEEEen
dc.rights.accessRightsopen accessen
dc.subject.ecienciaElectrónicaes
dc.subject.otherFracture toughnessen
dc.subject.otherAustenitic stainless steel welsen
dc.subject.otherCryogenicen
dc.subject.otherSecondary phasesen
dc.titleSecondary Phases Quantification and Fracture Toughness at Cryogenic Temperature of Austenitic Stainless Steel Welds for High-Field Superconducting Magnetsen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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