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Kinetics of sigma phase formation in a duplex stainless steel

Magnabosco R. (2009)

This work determines the kinetics of sigma phase formation in UNS S31803 Duplex Stainless Steel (DSS), describing the phase transformations that occur in isothermal aging between 700 and 900 °C for time periods up to 1032 ...

Selective corrosion of 550°C aged Cu10Ni-3Al-1.3Fe alloy in NaCl aqueous solution

Liberto R.C.N.; Magnabosco R.; Alonso-Falleiros N. (2011)

This work studied the electrochemical behavior of a solution treated or 550°C aged Cu10Ni-3Al-1.3Fe alloy, in 0.01M NaCl aqueous solution, through potentiodynamic polarization in both stagnant condition or under erosion ...

Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650°C

De Melo E.B.; Magnabosco R.; De Moura Neto C. (2013)

This work evaluates the phase transformations during aging of an UNS S31803 DSS at 650°C and its influence on the DOS. The material was solution treated at 1175°C and then aged at 650°C for times up to 360 h. SEM-BSC images ...

Selective corrosion in sodium chloride aqueous solution of cupronickel alloys with aluminum and iron additions

Liberto R.C.N.; Magnabosco R.; Alonso-Falleiros N. (2007)

Cupronickel pipes are widely used in cooling systems. Under this application, localized corrosion is observed, particularly associated with selective corrosion of nickel (denickelification). This work studied the ...

Effect of sulfate on the pitting potential of austenitic stainless steels 18Cr8Ni and 17Cr6Mn5Ni in chloride media

Calderon-Hernandez J.W.; Hincapie-Ladino D.; Magnabosco R.; Alonso-Falleiros N. (2019)

© 2019, Escola de Minas. All rights reserved.Pitting corrosion resistance of two austenitic stainless steels, 18Cr8Ni (Type 304L or UNS S30403 stainless steel) and 17Cr6Mn5Ni, was evaluated in three electrolytic solutions ...

Effect of Niobium on Phase Transformations, Mechanical Properties and Corrosion of Supermartensitic Stainless Steel

de Oliveira M.P.; Calderon-Hernandez J.W.; Magnabosco R.; Hincapie-Ladino D.; Alonso-Falleiros N. (2017)

© 2017, ASM International.The influence of niobium addition in a supermartensitic stainless steel with 13Cr-5Ni-2Mo has been studied. The steel with Nb tempered at 600 °C for 2 h showed improved mechanical resistance ...

Effect of rolling on the residual stresses and magnetic properties of a 0.5% Si electrical steel

de Campos M.F.; Sablik M.J.; Landgraf F.J.G.; Hirsch T.K.; Machado R.; Magnabosco R.; Gutierrez C.J.; Bandyopadhyay A. (2008)

Cold-rolled (0-19% of reduction) 0.5% Si electrical steel sheets were studied in detail, including macro and micro residual stress measurements, crystallographic texture, dc-hysteresis curves and iron losses. Even for the ...

Use of composition profiles near sigma phase for assessment of localized corrosion resistance in a duplex stainless steel

Magnabosco R.; da Costa Morais L.; dos Santos D.C. (2019)

© 2018 Elsevier LtdPitting corrosion potential of a UNS S31803 duplex stainless steel (DSS) heat treated between 750 °C and 850 °C at different aging times was related to the extent of the Cr- and Mo-depleted areas at ...

Evaluation of microstructural effects on the degree of sensitization (DOS) of a UNS S31803 duplex stainless steel aged at 475°C

De Melo E.B.; Magnabosco R. (2015)

© 2015, NACE International.In this study, microstructural and electrochemical behavior of a UNS S31803 duplex stainless steel aged at 475°C were investigated. Hardness values increased with aging at 475°C and evidence of ...

Experimental investigations and DICTRA® simulation of sigma phase formation in a duplex stainless steel

Morais L.D.C.; Magnabosco R. (2017)

© 2017 Elsevier LtdSigma phase formation in an UNS S31803 duplex stainless steel aged at 940 °C was evaluated by computational simulation in DICTRA® software, using MOB2 diffusion database and TCFE8 thermodynamic database. ...