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

2020 ◽  
Author(s):  
Irene Calliari ◽  
Marco Breda ◽  
Claudio Gennari ◽  
Luca Pezzato ◽  
Massimo Pellizzari ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Secondary Phase ◽  
Secondary Phases ◽  
Phase Precipitation ◽  
Heat Treated ◽  
Super Duplex Stainless Steels ◽  
Short Times ◽  
Stainless Steel Heat ◽  
Steel Heat

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.

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

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 967
Author(s):  
Irene Calliari ◽  
Marco Breda ◽  
Claudio Gennari ◽  
Luca Pezzato ◽  
Massimo Pellizzari ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Secondary Phase ◽  
Secondary Phases ◽  
Phase Precipitation ◽  
Σ Phase ◽  
Heat Treated ◽  
Key Factor ◽  
Super Duplex Stainless Steels ◽  
Welding Processes

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.

Secondary Phases Precipitation in the 2510 Duplex Stainless Steel

2009 ◽  
Vol 1242 ◽  
Author(s):  
Arturo Reyes ◽  
Irene Calliari ◽  
Emilio Ramous ◽  
Michela Zanellato ◽  
Mattia Merlin
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Sigma Phase ◽  
Secondary Phases ◽  
Heat Treated ◽  
Duplex Steel ◽  
Super Duplex Stainless Steels ◽  
History Of ◽  
Short Times ◽  
Steel Heat

ABSTRACTA lot of duplex and super duplex stainless steels are prone to secondary phases but with different sequence and kinetic which depend on the chemical composition and thermo-mechanical history of the steel. In this paper the results of secondary phase's determination in a welding grade 2510 duplex steel, heat treated at 850–1050°C for 3–30 min are presented. The precipitation stars at grain boundaries with a consistent ferrite transformation for short times. The noses of the TTP curves are at 1000°C (sigma phase) and at 900°C (chi phase) with a partial transformation of chi to sigma, as evidenced in 2205 and 2507 grades.

scholarly journals Erratum to: Intergranular Corrosion Behavior of 304LN Stainless Steel Heat Treated at 623 K (350 °C)

2013 ◽  
Vol 44 (7) ◽  
pp. 3419-3419 ◽  
Author(s):  
Raghuvir Singh ◽  
Mukesh Kumar ◽  
Mainak Ghosh ◽  
Gautam Das ◽  
P. K. Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Heat Treated ◽  
304Ln Stainless Steel ◽  
Stainless Steel Heat ◽  
Steel Heat

Effect of Secondary Phase Precipitation on Impact Toughness of Duplex Stainless Steel

2017 ◽  
Vol 889 ◽  
pp. 138-142 ◽  
Author(s):  
Amit Powar ◽  
Amol Gujar ◽  
Niketan Manthani ◽  
Vinayak Pawar ◽  
Rajkumar Singh
Keyword(s):  
Stainless Steel ◽  
Impact Toughness ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Secondary Phase ◽  
Phase Precipitation ◽  
X Ray Diffraction ◽  
Σ Phase ◽  
Material Solution ◽  
The Impact

Duplex Stainless Steel (DSS) combines good mechanical strength and ductility with moderate to good corrosion resistance in a variety of environments. DSS are prone to the formation of various intermetallic phases (σ, χ, π, R), carbides (M23C6) and nitrides (Cr2N), when it exposed to temperatures lower than 1000°C. This study focuses on effect of secondary phase precipitation on impact toughness of ASTM A182 DSS. Cylindrical bar of DSS was open die forged in the temperature range of 1200-1050°C. After the forging, the bar was slow cooled by covering it with ceramic wool. This leads to the formation of σ phase at the ferrite/austenite interfaces and significantly reduced the impact toughness of the material. Solution treatment was done at different temperature and effect on toughness studied. The microstructural changes produced as consequences of the distinct test condition have been analyzed by means of optical and electron microscopy, X-ray diffraction.

Intergranular Corrosion Behavior of 304LN Stainless Steel Heat Treated at 623 K (350 °C)

2012 ◽  
Vol 44 (S1) ◽  
pp. 173-187
Author(s):  
Raghuvir Singh ◽  
Mukesh Kumar ◽  
Mainak Ghosh ◽  
Gautam Das ◽  
P. K. Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Heat Treated ◽  
304Ln Stainless Steel ◽  
Stainless Steel Heat ◽  
Steel Heat

Characterisation of EN 1.4136 stainless steel heat-treated in solar furnace

2018 ◽  
Vol 101 (9-12) ◽  
pp. 2955-2964 ◽  
Author(s):  
Ioan Milosan ◽  
Daniel Cristea ◽  
Ionelia Voiculescu ◽  
Mihai Alin Pop ◽  
Marianne Balat-Pichelin ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Solar Furnace ◽  
Heat Treated ◽  
Stainless Steel Heat ◽  
Steel Heat
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