Quantitative micro-electrochemical study of duplex stainless steel 2205 in 3.5wt% NaCl solution

Cai, Shuangyu; Lu, Ke-ke; Li, Xinnan; Wen, Liping; Huang, Feifei; Jin, Ying

doi:10.1007/s12613-021-2291-5

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…2 that the microstructure in 2507 DSS was homogeneous and refined. Similar results could be obtained in the literature [21].…”

Section: Resultssupporting

confidence: 92%

“…It was obvious that the Cr and Ni in 2507 DSS was more than that in 2205 DSS [19,20]. The Cr element was a ferrite-forming element and the Ni element was an austenite-forming element [4], More Cr element was beneficial for the formation of Cr-containing passivation film on the surface of the material, and this may improve the corrosion resistance of specimens [21].…”

Section: Methodsmentioning

confidence: 99%

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Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

Wu,

Lian,

et al. 2023

Tribology Online

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Herein, cavitation erosion tests were carried out on 2205 and 2507 duplex stainless steels (DSSs) in distilled water and artificial seawater using ultrasonic cavitation erosion equipment. Optical microscope (OM), X-ray diffractometer (XRD), and scanning electron microscope (SEM) were used to observe the microstructure and cavitation erosion morphology of the specimens. Cavitation erosion and corrosion behaviors of the specimens were analyzed and the synergistic effect between cavitation erosion and corrosion in artificial seawater was also examined. The results show that the cavitation erosion resistance of 2507 DSS is better than that of 2205 DSS in all kinds of solutions. The destruction occurs first in ferrite due to its lower plasticity. The synergistic effect of cavitation erosion and corrosion accelerates the destruction of the material, and the mass loss caused by cavitation erosion-corrosion synergy for 2205 DSS is higher than that of 2507 DSS.

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“…2 that the microstructure in 2507 DSS was homogeneous and refined. Similar results could be obtained in the literature [21].…”

Section: Resultssupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

Wu,

Lian,

et al. 2023

Tribology Online

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show abstract

“…The area fraction of δ-ferrite ( f δ ) as a function of time in DSSs 2507 and 3207 can be fit by Equation ( 4) and (5).…”

Section: In Situ Characterization Of Solidification Of Dsss 2507 and ...mentioning

confidence: 99%

“…[4] The optimization of the mechanical properties and corrosion resistance of DSSs depends on the precise control of microstructure evolution. [5,6] One of the aspects that play an important role is the solidification process control. It is reported that the hot-crack susceptibility is related closely to the ferrite/austenite ratio during the solidification process of the steel.…”

Section: Introductionmentioning

confidence: 99%

Combination of In Situ Confocal Microscopy and Calorimetry to Investigate Solidification of Super‐ and Hyper‐Duplex Stainless Steels

Wang

Sukenaga

Shibata

et al. 2023

steel research int.

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The solidification processes of super‐ and hyper‐duplex stainless steels (i.e., UNS S32750 and S 33 207) are investigated in situ by a high‐temperature confocal laser scanning microscope (HT‐CLSM) and differential scanning calorimetry (DSC). The variations of δ‐ferrite phase fraction during solidification are measured quantitatively. The results show that liquid L→δ‐ferrite transformation first occurs at a certain degree of supercooling during the solidification process of steel. UNS S3DSS 3207 with a higher Cr content can result in a higher nucleation temperature and faster growth of δ‐ferrite compared to those of UNS S332750 steel. Moreover, both the liquidus (TL) and solidus temperatures (TS) are increased with the increasing Cr content, while TL increases greater than TS. Electron microscopies are used to quantify the fraction and composition of each phase. Scheil equation is employed to predict the distribution behavior of the main alloying elements in the solidification process, and the predicted results are consistent with the experimental findings. This study aims to provide real‐time experimental insights into the solidification kinetics of state‐of‐the‐art high‐alloy‐grade duplex steels and benefits for controlling the casting process in the real production of stainless steels.

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“…Lean duplex stainless steel (LDSS) had excellent corrosion resistance and high mechanical properties, as well as better price stability, and was a substitute for the current classical austenite stainless steel. [1][2][3] Due to the special dual-phase structure and high N content of LDSS, poor thermoplastic had always been the key problem restricting its production and application. Meanwhile, the large difference in the strength of the ferrite phase and austenite phase occurred under the hot working state.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Texture Evolution of Ferrite and Austenite Phases in Lean Duplex Stainless Steel

Zhang,

Cao,

et al. 2024

steel research int.

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To avoid cracks during hot rolling, a short process of direct cold rolling following solution treatment of the casting billet for preparing lean duplex stainless steel plates is proposed. The effect of cold rolling reduction on the microstructure, texture, and mechanical properties of UNS S32101 is investigated. The results show that dislocation slip is the main character in ferrite, which leads to dislocation tangles, dislocation cells, high‐density dislocation walls, and deformed microbands. However, twinning and strain‐induced martensite transformation (SIMT) occur in austenite, and the SIMT mechanism of austenite follows the classical model γ → ε → α′ and γ → α′, with the orientation relationship of Kurdjumov–Sachs ( and ) and Nishyama–Wassermann (N–W) ( and ). Meanwhile, at 50%, there is a transition from Cu texture to Brass texture in the austenite phase. At 12.5%, the yield strength is 344 MPa higher than that of the traditional hot rolling process, and the elongation remains about 35%. With the increasing cold rolling reduction, the elongation decreases while the strength rises significantly. Strengthening dislocations, fine‐tuning grains, and SIMT are the primary contributors to the improvement in strength.

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Quantitative micro-electrochemical study of duplex stainless steel 2205 in 3.5wt% NaCl solution

Cited by 8 publications

References 21 publications

Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

Combination of In Situ Confocal Microscopy and Calorimetry to Investigate Solidification of Super‐ and Hyper‐Duplex Stainless Steels

Deformation Behavior and Texture Evolution of Ferrite and Austenite Phases in Lean Duplex Stainless Steel

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