Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Investigation on Solid State Phase Transformations in a 2510 Duplex Stainless Steel Grade

Version 1 : Received: 2 July 2020 / Approved: 3 July 2020 / Online: 3 July 2020 (09:00:28 CEST)

A peer-reviewed article of this Preprint also exists.

Calliari, I.; Breda, M.; Gennari, C.; Pezzato, L.; Pellizzari, M.; Zambon, A. Investigation on Solid-State Phase Transformations in a 2510 Duplex Stainless Steel Grade. Metals 2020, 10, 967. Calliari, I.; Breda, M.; Gennari, C.; Pezzato, L.; Pellizzari, M.; Zambon, A. Investigation on Solid-State Phase Transformations in a 2510 Duplex Stainless Steel Grade. Metals 2020, 10, 967.

Journal reference: Metals 2020, 10, 967
DOI: 10.3390/met10070967

Abstract

Duplex and Super Duplex Stainless Steels are very prone to secondary phases formation related to ferrite decomposition at high temperatures. In the present paper the results on secondary phase precipitation in a 2510 Duplex Stainless Steel, heat treated in the temperature range 850-1050 °C for 3-30 minutes are presented. The precipitation starts at grain boundaries with a consistent ferrite transformation for very short times. The noses of the TTP curves are at 1000 °C for σ-phase and at 900 °C for χ-phase, respectively. The precipitation sequence involves a partial transformation of χ into σ, as previously evidenced in 2205 and 2507 grades. Furthermore, the experimental data were compared to the results of Thermo-Calc calculations.

Subject Areas

duplex stainless steels; isothermal heat treatment; secondary phases precipitation; TTP curves

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