Effects of heat treatment on precipitation and corrosion resistance of cerium-containing super austenitic stainless steel S31254

Zhang, Xiaoli; Xun, Maonian; Ma, Jinyao; Liang, Xin; Zhang, Caili; Li, Huabing; Fan, Guangwei; Han, Peide

doi:10.1016/j.corcom.2022.06.001

Cited by 20 publications

(1 citation statement)

References 29 publications

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“…It can be seen that the change in nitrogen content and solution temperature has no effect on E corr and E p , but the corrosion current is different. The i corr of both samples reaches its minimum under the solution heattreatment condition of 1180 • C. However, under the same condition, the i corr of 0.4N-ST samples is lower than that of 0.2N-ST samples, indicating that the corrosion resistance of passivated film is better [21,22]. Figure S2 shows the surface morphology of the 0.2N sample after solution treatment at 1180 • C following potentiodynamic polarization measurement.…”

Section: Polarization Curve Measurementsmentioning

confidence: 99%

Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel

Tian,

Wang,

Liu

et al. 2024

Metals

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6Mo super austenitic stainless steel (SASS) with nitrogen contents of 0.2 and 0.4 (wt.%) was melted, and solution treatments at 1100, 1180, and 1250 °C for 30 min were performed. The effects of nitrogen on the microstructure and pitting resistance of the two steels that signed as 0.2N and 0.4N samples were investigated. At a heat-treatment temperature of 1180 °C, the alloy demonstrates the highest corrosion resistance, attributed to the combined effects of grain size and precipitates. The structure of the passivation film changes with increasing nitrogen content, with the Cr/Fe ratio is significantly higher in the 0.4N sample compared to the 0.2N sample. Moreover, the increase in nitrogen content results in thicker Cr and Mo oxide layers and higher levels of NH3 and NH4+, thereby improving the corrosion resistance of the stainless steel.

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Section: Polarization Curve Measurementsmentioning

confidence: 99%

Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel

Tian,

Wang,

Liu

et al. 2024

Metals

Self Cite

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Effect of Boron on the Solidification Characteristics and Constitutive Equation of S31254 Superaustenitic Stainless Steel

Liu,

Wang,

Chen

et al. 2024

steel research int.

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Solidification structure and segregation behavior of S31254 superaustenitic stainless steel ingot containing 0 wt% B and 0.005 wt% B are investigated. The results show that serious element segregation and massive eutectics are present in the center of the ingot. By contrast, the addition of boron reduces the secondary dendrite spacing, the degree of elemental segregation, and the σ phase. Further, the effect of boron on the solidification process is studied by using the high‐temperature confocal laser scanning microscope and combined with Thermo‐Calc thermodynamic simulation results. The results show that boron can widen the solidification temperature range and greatly retard the matrix solidification. The role of boron in refining dendrite structure and inhibiting precipitation is further confirmed. The effect of boron on the constitutive equation of S31254 superaustenitic stainless steel has also been researched through isothermal compression testing in the temperature range of 950–1200 °C and strain rate range of 0.01–10 s−1. The activation energy of the boron‐free and boron‐containing S31254 superaustenitic stainless steels based on the constitutive equation are 427.77 and 495.80 kJ mol−1, respectively. Processing maps indicate that the instability domain is significantly reduced and the hot ductility is improved after the addition of B.

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Effect of Ce on the Segregation and Secondary-Phase Precipitation During the Solidification of S31254 Super-Austenitic Stainless Steel

Chen,

Bai,

Wang

et al. 2024

Metall Mater Trans B

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Effects of heat treatment on precipitation and corrosion resistance of cerium-containing super austenitic stainless steel S31254

Cited by 20 publications

References 29 publications

Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel

Effect of Nitrogen on the Corrosion Resistance of 6Mo Super Austenitic Stainless Steel

Effect of Boron on the Solidification Characteristics and Constitutive Equation of S31254 Superaustenitic Stainless Steel

Effect of Ce on the Segregation and Secondary-Phase Precipitation During the Solidification of S31254 Super-Austenitic Stainless Steel

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