Plasma keyhole welding of uns s32760 super duplex stainless steel: Microstructure and mechanical properties

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dc.contributor.author Migiakis, K en
dc.contributor.author Daniolos, N en
dc.contributor.author Papadimitriou, GD en
dc.date.accessioned 2014-03-01T01:34:18Z
dc.date.available 2014-03-01T01:34:18Z
dc.date.issued 2010 en
dc.identifier.issn 1042-6914 en
dc.identifier.uri http://hdl.handle.net/123456789/20684
dc.subject Fracture en
dc.subject Impact toughness en
dc.subject Mechanical properties en
dc.subject Microstructure en
dc.subject Nitrogen addition en
dc.subject Plasma keyhole en
dc.subject Super duplex stainless steel en
dc.subject Tensile strength en
dc.subject Welding en
dc.subject Zeron 100 en
dc.subject.classification Engineering, Manufacturing en
dc.subject.classification Materials Science, Multidisciplinary en
dc.subject.other Ductile to brittle transitions en
dc.subject.other Duplex stainless steel en
dc.subject.other Fusion zones en
dc.subject.other Impact toughness en
dc.subject.other Keyhole welding en
dc.subject.other Microstructure and mechanical properties en
dc.subject.other Nitrogen addition en
dc.subject.other Nitrogen additions en
dc.subject.other Plasma gas en
dc.subject.other Protective gas en
dc.subject.other Shielding gas en
dc.subject.other Standard requirements en
dc.subject.other Super duplex stainless steel en
dc.subject.other Temperature range en
dc.subject.other Transition temperature en
dc.subject.other Weldments en
dc.subject.other Argon en
dc.subject.other Corrosion resistant alloys en
dc.subject.other Ferrite en
dc.subject.other Fracture en
dc.subject.other Fracture toughness en
dc.subject.other Hardness en
dc.subject.other Impact strength en
dc.subject.other Mechanical properties en
dc.subject.other Microstructure en
dc.subject.other Nitrogen en
dc.subject.other Nitrogen plasma en
dc.subject.other Tensile strength en
dc.subject.other Welding en
dc.subject.other Stainless steel en
dc.title Plasma keyhole welding of uns s32760 super duplex stainless steel: Microstructure and mechanical properties en
heal.type journalArticle en
heal.identifier.primary 10.1080/10426910903179955 en
heal.identifier.secondary http://dx.doi.org/10.1080/10426910903179955 en
heal.language English en
heal.publicationDate 2010 en
heal.abstract The present investigation concerns plasma-keyhole welding of UNS S32760 super-duplex stainless steel. Apart from Argon, a mixture of argon with 2 vol% nitrogen was used in both plasma and shielding gas, in order to improve the austenite/ferrite balance. Keyhole welding with argon provides with a narrow fusion zone with a satisfactory microstructure, which is further improved by the addition of nitrogen in the plasma and protective gas. The mechanical properties, in terms of hardness and impact strength, have been studied and compared for both operating gases used. It has been shown that better mechanical properties of the weldments are obtained when using an argon-2vol% nitrogen mixture. All welded specimens exhibit satisfactory impact toughness with regard to standard requirements. Ductile to brittle transition takes place in the temperature range from -40°C to -65°C. Nitrogen addition to the plasma gas affects positively the impact toughness of the weldments above the transition temperature, but below this temperature the effect of nitrogen becomes negative. This is interpreted in terms of the austenite-to-ferrite ratio and of the possibility of ferrite to deform by twinning even in the subcritical temperature range. © Taylor & Francis Group, LLC. en
heal.publisher TAYLOR & FRANCIS INC en
heal.journalName Materials and Manufacturing Processes en
dc.identifier.doi 10.1080/10426910903179955 en
dc.identifier.isi ISI:000280678300011 en
dc.identifier.volume 25 en
dc.identifier.issue 7 en
dc.identifier.spage 598 en
dc.identifier.epage 605 en

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