Publicación:
EXPLORING THE IMPACT OF COOLING RATE ON MICROSTRUCTURAL FEATURES, MECHANICAL PROPERTIES, AND CORROSION RESISTANCE OF A NOVEL NB-STABILIZED SUPER DUPLEX STAINLESS STEEL IN SHIELDED METAL ARC WELDING

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dc.creatorANGELO GIOVANNI OÑATE SOTO
dc.date2023
dc.date.accessioned2025-01-10T15:40:54Z
dc.date.available2025-01-10T15:40:54Z
dc.date.issued2023
dc.description.abstractTHE CORROSION AND MECHANICAL RESPONSE PRODUCED BY QUENCHING IN THE WELDED JOINT OF A NEW NB-DOPED STAINLESS STEEL DESIGNED BY THE CALPHAD METHOD AND PRODUCED BY OPEN-ATMOSPHERE CASTING WITH RECYCLED MATERIALS WERE INVESTIGATED TO CONTRIBUTE TO THE CIRCULAR ECONOMY AND TO ESTABLISH DISRUPTIVE MANUFACTURING CRITERIA BASED ON METALLURGICAL PRINCIPLES. THE STEEL WAS INITIALLY SUBJECTED TO SOLUBILIZATION HEAT TREATMENT AND PARTIAL SOLUBILIZATION TREATMENT AT 1090 °C TO OBTAIN AN APPROPRIATE ?/? BALANCE AND CARBIDE SOLUBILIZATION. IT WAS THEN WELDED BY THE SMAW PROCESS, QUENCHED, AND TEMPERED AT THREE DIFFERENT COOLING RATES. AS A RESULT, A GOOD FIT BETWEEN THE PHASES PREDICTED BY THE CALPHAD METHOD AND THOSE OBSERVED BY X-RAY DIFFRACTION AND SCANNING ELECTRON MICROSCOPY WERE OBTAINED, WITH MINOR DIFFERENCES ATTRIBUTABLE TO THE PRECIPITATION AND DIFFUSION KINETICS REQUIRED FOR DISSOLUTION OR NUCLEATION AND GROWTH OF THE PHASES IN THE SYSTEM. THE FORCED AIR QUENCHING MECHANISM WAS IDENTIFIED AS PROVIDING AN ?/? PHASE EQUILIBRIUM EQUIVALENT TO 62/38 AS THE MOST EFFECTIVE QUENCHING METHOD FOR ACHIEVING THE OPTIMUM MECHANICAL AND CORROSION RESPONSE, EVEN WITH THE POST-WELD ? PHASE AND SHOWING SUPERIOR RESULTS TO THOSE OF THE BASE METAL. THE OUTSTANDING MECHANICAL AND CORROSION RESPONSES RESULTED FROM A PROPER BALANCE OF THE PRIMARY PHASES IN THE DUPLEX STEEL WITH A PRECIPITATION-STRENGTHENING MECHANISM. THE DAMAGE TOLERANCE OBTAINED BY FORCED AIR QUENCHING WAS SUPERIOR TO THAT OBTAINED BY WATER AND AIR QUENCHING, WITH A PSE OF 24.71 GPA% POST-WELDING.
dc.formatapplication/pdf
dc.identifier.doi/10.3390/cryst13081192
dc.identifier.issn2073-4352
dc.identifier.issn2073-4352
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/13161
dc.languagespa
dc.publisherCrystals
dc.relation.uri/10.3390/cryst13081192
dc.rightsPUBLICADA
dc.subjectsuper duplex stainless steel
dc.subjectsigma phase
dc.subjectmechanical response
dc.subjectcorrosion
dc.titleEXPLORING THE IMPACT OF COOLING RATE ON MICROSTRUCTURAL FEATURES, MECHANICAL PROPERTIES, AND CORROSION RESISTANCE OF A NOVEL NB-STABILIZED SUPER DUPLEX STAINLESS STEEL IN SHIELDED METAL ARC WELDING
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA MECANICA
ubb.SedeCONCEPCIÓN
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