Influence of Ce Addition on Microstructure and Corrosion Resistance of 2101 Duplex Stainless Steel

Gong, Wu; Zhang, Lixiang; Zhang, Lei; Wang, Engang

doi:10.1002/srin.202100003

Cited by 11 publications

(4 citation statements)

References 35 publications

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“…The pitting images confirm that the smaller pit size on the stellite‐6 deposit shows excellent pitting resistance and the substrate has lower pitting resistance. [ 71 ] The morphology of the pit boundary is irregular in shape without any preferential direction. The increase in pitting resistance of hardfaced stellite‐6 specimen is mainly confirmed by the fraction of Cr, W, and Co fraction from SEM–EDS analysis.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Sankarapandian¹,

Kumar

Kannan

et al. 2023

steel research int.

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Hardfacing is an effective method for restoring the damaged part. Herein, cobalt‐based superalloy Stellite‐6 is deposited on A36 substrate using gas metal arc welding process. The mechanical properties, microstructure, and corrosion behavior of Stellite‐6 overlays on A36 substrate are examined. Defect‐free hard overlays are obtained, and a dilution ratio of 19.9% is achieved with weaving technique. X‐ray diffraction analysis reveals the presence of M7C3, M23C6, M6C, and martensite in the Stellite‐6 hard overlays. The microstructure of the deposit contains martensite, carbides, and interdendritic precipitates while the mean hardness is 471 HV0.5. Tensile testing with specimens extracted on the longitudinal (LD) and transverse (TD) orientation of the stellite‐6 deposit shows a strength above 950 MPa along with the brittle nature of fracture. Grain growth is epitaxial and shows dendritic morphologies. The higher fraction of high‐angle grain boundaries improves the tensile strength of the deposit and interface region. The localized corrosion behavior of stellite‐6 hard overlays is found to be excellent, and the corrosion analysis exhibits a corrosion rate of 0.10 mils per year (mpy). The outcomes of the study highlight the feasibility of Stellite‐6 hard overlays for extending the service life of A36 steel in chloride environments.

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Section: Resultsmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Sankarapandian¹,

Kumar

Kannan

et al. 2023

steel research int.

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“…Ferrite (δ)/austenite (γ) duplex stainless steel (DSS) combines most of the beneficial properties of austenitic stainless steel (ASS) and ferritic stainless steel (FSS), including an excellent association of strength and toughness, good corrosion resistance, well cold and hot formability, weldability, and lower cost than the ASS and Ni-based alloy due to the addition of low amounts of Ni. [1,2] Thus, DSS has increasingly been used for various fields such as marine engineering, oil and natural gas industry, petrochemical engineering, pressure vessels and boilers, desalination equipment, and nuclear power facilities. [3,4] However, to attain the above excellent properties, DSS needs to maintain a δ/γ dual-phase balance without harmful secondary phase precipitation.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Its Influence on Low‐Temperature Toughness of Simulated Heat‐Affected Zone in Super Duplex Stainless Steel Welded Joint

Zhang,

Chu,

Zhang

et al. 2023

steel research int.

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The microstructures of heat‐affected zone (HAZ) during multipass welding procedure of super duplex stainless steel (DSS) are simulated by a thermomechanical simulator. The influences of ferritization, 1st‐reheating, and 2nd‐reheating process on the microstructural evolution and toughness of the HAZ are studied. The results show that the alternating bands of ferrite and austenite are transformed into coarse equiaxed ferrite and different types of primary austenite (γ1). The austenite content significantly decreases and a great number of Cr2N precipitate in the ferritized HAZ comparing with as‐received super DSS. In addition, the 1st‐reheating temperature has significant influence on microstructure of the ferritized HAZ. The austenite content increases but the precipitation tendency of Cr2N reduces with the raising of 1st‐reheating temperature. Secondary austenite (γ2) is prone to precipitate after the 1st‐reheating at 1000 °C. A combined precipitation behavior of γ2 and Cr2N is clarified during the reheating process. Furthermore, the 2nd‐reheating at 900 °C promotes Cr2N precipitation again as well as austenite formation. The toughness is mainly related with ductile austenite content, hard‐brittle Cr2N amount, and N supersaturation degree in the ferrite. In order to raise toughness of the ferritized HAZ, it is recommended to reheat at above 1200 °C.

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“…Jeon S [27] pointed out that the addition of Ce to HDSS increases the resistance to pitting corrosion due to the formation of stable Ce oxide and the reduction of pitting initiation sites. As a result, Mg-Ce composite treatment can modify and refine inclusions, increase the strength and toughness of steel [28], and improve the corrosion resistance of steel [29]. However, systematic studies investigating the effect of Mg-Ce composite treatment on the inclusions of marine steel are not yet complete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg-Ce Treatment on Inclusion Characteristics and Pitting Corrosion Behavior in EH420 Marine Steel

Guo

Liu

Wang

et al. 2023

Metals

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Reasonable regulation of nonmetallic inclusions in steel can significantly improve its strength, toughness, and corrosion resistance. In this paper, EH420 marine steel was treated with Mg, Ce, and Mg-Ce to modify the inclusions. The effects of different treatments on the morphology, composition, size distribution, induced intragranular ferrite (IGF) nucleation, and pitting resistance of inclusions were systematically analyzed using various methods. The results show that the Mg-Ce composite treatment can modify irregular MgAl2O4 inclusions into spherical Mg-Ce-O composite inclusions and MgO-dominated inclusions. The density of inclusions is increased from 74.8/mm2 to 186.0/mm2, and the average size of inclusions is decreased from 2.60 μm to 1.07 μm. The Mg-Ce-O composite inclusions are effective inclusions for inducing IGF. Furthermore, the pitting potential is increased from −503 mV to −487 mV, and the corrosion rate is decreased. The order of average electronic work function is ΦMgO < ΦCe2O3 < Φα-Fe < ΦAl2O3. Ce2O3 is hard to induce pitting corrosion due to its similar electronic work function to the steel matrix. Thus, the Mg-Ce composite treatment is better than that for Mg and Ce treatment alone, and has better application prospects.

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Influence of Ce Addition on Microstructure and Corrosion Resistance of 2101 Duplex Stainless Steel

Cited by 11 publications

References 35 publications

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Microstructural Evolution and Its Influence on Low‐Temperature Toughness of Simulated Heat‐Affected Zone in Super Duplex Stainless Steel Welded Joint

Effect of Mg-Ce Treatment on Inclusion Characteristics and Pitting Corrosion Behavior in EH420 Marine Steel

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