Jan-Olof Nilsson | Author | SciTechnol | Research and Reports on

Jan-Olof Nilsson Author

ferro@gest.unipd.it 39 0444 998769 | 39 0444 9987

Subjects of specialization
Kinetics; Modeling,Precipitation,Sigma phase

Affiliation
Department of Engineering and Management, University of Padova, Stradella San Nicola 3, 36100 Vicenza, Italy

Biography

A great number of studies have been conducted on the kinetics and microstructural evolution of intermetallic phases in duplex and superduplex stainless steels (DSS, SDSS) since their presence significantly influences the mechanical properties and corrosion resistance of the mechanical components Duplex stainless steel; Sigma phase; Precipitation; Kinetics; Modeling Department of Engineering and Management, University of Padova, Stradella San Nicola 3, 36100 Vicenza, Italy

Publications

Research Article Open Access

Intermetallic Phase Precipitation in Duplex Stainless Steels: Considerations on the Use of Johnson-Mehl-Avrami-Kolmogorov Equation

Author(s):

Paolo Ferro, Alberto Fabrizi and Jan-Olof Nilsson

Despite the great interest in intermetallic phase precipitation in duplex and super duplex stainless steels, a common controlling factor in the kinetics of its formation has not been reached yet. For example, when the time-evolution of sigma phase precipitation is described by the Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation, or its modified forms, very different kinetic parameters were found in the literature, even if duplex stainless steels with very similar chemical composition and initial conditions are used in the experiments. In this work, some critical points that affect the evaluation of the kinetic constants and may cause erroneous interpretation of intermetallic phase precipitation (kinetics) are highlighted and discussed. It was shown that the c... view more»

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