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Open AccessArticle

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

1
Department of Industrial Engineering, University of Padova, Via Marzolo, 9, 35131 Padova, Italy
2
Unilab Laboratori Industriali S.r.l., Via Umbria 22, 35043 Monselice (PD), Italy
3
Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
4
Department of Management and Engineering, University of Padua, Stradella S. Nicola 3, 36100 Vicenza, Italy
*
Author to whom correspondence should be addressed.
Metals 2020, 10(7), 967; https://doi.org/10.3390/met10070967
Received: 12 June 2020 / Revised: 2 July 2020 / Accepted: 14 July 2020 / Published: 17 July 2020
(This article belongs to the Special Issue Heat Treatment of Iron- and Aluminum-Based Alloys)
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 min are presented. The precipitation starts at grain boundaries with a consistent ferrite transformation for very short times. The noses of the Time–Temperature–Precipitation (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. Understanding and ability to predict phase stability in 2510 duplex stainless steel is a key factor to design optimal welding processes that avoid any secondary phase precipitation in the weld bead as well as in the heat-affected zone. View Full-Text
Keywords: duplex stainless steels; isothermal heat treatment; secondary phase precipitation; TTP curves duplex stainless steels; isothermal heat treatment; secondary phase precipitation; TTP curves
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MDPI and ACS Style

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. https://doi.org/10.3390/met10070967

AMA Style

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(7):967. https://doi.org/10.3390/met10070967

Chicago/Turabian Style

Calliari, Irene; Breda, Marco; Gennari, Claudio; Pezzato, Luca; Pellizzari, Massimo; Zambon, Andrea. 2020. "Investigation on Solid-State Phase Transformations in a 2510 Duplex Stainless Steel Grade" Metals 10, no. 7: 967. https://doi.org/10.3390/met10070967

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