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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2013

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About heat treatment and properties of Duplex Stainless Steels

Rosso M., Peter I., Suani D

Journal of Achievements in Materials and Manufacturing Engineering

2013

Vol. 59, nr 1

26--36

Purpose: of this paper is to review the effect of heat treatments and of strain hardening on microstructure and properties of superduplex stainless steels. Design/methodology/approach: Annealing and strain hardening treatments influences microstructures and properties. Findings: The characteristics and the properties of the industrially employed superduplex grade has been discussed, moreover the presence and the precipitation of sigma phase has been highlighted through ageing treatments. Research limitations/implications: : Based on the up to date achieved outcomes, it appears that a quite homogeneous and good mechanical properties can be obtained controlling the composition and the heat treatment and strain hardening parameters. Practical implications: The major implication is related to the transfer toward the proper choice of correct parameters for working the duplex grades. Originality/value: to supply deeper information with respect to those available in literature, which does not clearly indicate what amount of secondary phases existing in duplex stainless steel microstructure can be acceptable.