Retaining Mechanical Properties of GMA-Welded Joints of 9%Ni Steel Using Experimentally Produced Matching Ferritic Filler Metal

dc.contributor.authorEl-Batahgy, Abdel-Monem
dc.contributor.authorElkousy, Mohamed Raafat
dc.contributor.authorAl-Rahman, Ahmed Abd
dc.contributor.authorGumenyuk, Andrey
dc.contributor.authorRethmeier, Michael
dc.contributor.authorGook, Sergej
dc.date.accessioned2023-01-20T11:26:01Z
dc.date.available2023-01-20T11:26:01Z
dc.date.issued2022-11-30
dc.date.updated2022-12-07T12:36:23Z
dc.description.abstractMotivated by the loss of tensile strength in 9%Ni steel arc-welded joints performed using commercially available Ni-based austenitic filler metals, the viability of retaining tensile strength using an experimentally produced matching ferritic filler metal was confirmed. Compared to the austenitic Ni-based filler metal (685 MPa), higher tensile strength in gas metal arc (GMA) welded joints was achieved using a ferritic filler metal (749 MPa) due to its microstructure being similar to the base metal (645 MPa). The microstructure of hard martensite resulted in an impact energy of 71 J (−196 °C), which was two times higher than the specified minimum value of ≥34 J. The tensile and impact strength of the welded joint is affected not only by its microstructure, but also by the degree of its mechanical mismatch depending on the type of filler metal. Welds with a harder microstructure and less mechanical mismatch are important for achieving an adequate combination of tensile strength and notched impact strength. This is achievable with the cost-effective ferritic filler metal. A more desirable combination of mechanical properties is guaranteed by applying low preheating temperature (200 °C), which is a more practicable and economical solution compared to the high post-weld heat treatment (PWHT) temperature (580 °C) suggested by other research.en
dc.description.sponsorshipBMBF, 01DH14012, LoWELL - Laserstrahl- und Laserhybridschweißen von vergüteten 9% Ni Stählen für Konstruktion von LNG-Anlagen als sauberen Energiequellen
dc.identifier.eissn1996-1944
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/18024
dc.identifier.urihttps://doi.org/10.14279/depositonce-16816
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.other9%Ni steel
dc.subject.otherNi-based austenitic filler metal
dc.subject.othermatching ferritic filler metal
dc.subject.otherpreheating
dc.subject.otherpost-weld heat treatment
dc.subject.othermicrostructure
dc.subject.othermechanical mismatching
dc.titleRetaining Mechanical Properties of GMA-Welded Joints of 9%Ni Steel Using Experimentally Produced Matching Ferritic Filler Metal
dc.typeArticle
dc.type.versionpublishedVersion
dcterms.bibliographicCitation.articlenumber8538
dcterms.bibliographicCitation.doi10.3390/ma15238538
dcterms.bibliographicCitation.issue23
dcterms.bibliographicCitation.journaltitleMaterials
dcterms.bibliographicCitation.originalpublishernameMDPI
dcterms.bibliographicCitation.originalpublisherplaceBasel
dcterms.bibliographicCitation.volume15
dcterms.rightsHolder.referenceCreative-Commons-Lizenz
tub.accessrights.dnbfree
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme::Inst. Werkzeugmaschinen und Fabrikbetrieb::FG Fügetechnik
tub.publisher.universityorinstitutionTechnische Universität Berlin

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