Thermal aging at 475 °C of newly developed lean duplex stainless steel 2404: Mechanical properties and corrosion behavior

Silva, R.; Baroni, L.F.S.; Kugelmeier, Cristie Luis; Silva, M.B.R.; Kuri, S.E.; Rovere, Carlos Alberto Della

doi:10.1016/j.corsci.2016.12.014

Cited by 37 publications

(21 citation statements)

References 42 publications

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“…Cao et al [ 13 ] observed that the microstructural evolution by spinodal decomposition occurred after 1000 h of aging, and that G-phase precipitation in the ferrite phase, after aging for 5000 h, was responsible for stainless steel plasticity reduction and for making it more sensitive to crack initiation. The same reduction in the material’s ductility was also observed by Silva et al [ 14 ].…”

Section: Introductionsupporting

confidence: 84%

Preliminary Analysis of Long-Term Performance of a Piping: Aging and Creep Effects

Cancemi

Frano

2021

Materials

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Combining global experience, comprehensive aging knowledge, and predictive methodologies provides ideal prerequisites for the long-term operation strategy (LTO) of a nuclear power plant (NPP). Applying management strategies with an understanding of the ways in which structures relevant for the plant safety perform and interact in their operating environments is of meaningful importance for operating the plant beyond its originally licensed service life. In performing aging studies on the nuclear systems, structure, and components (SSCs), the results are crucial for demonstrating the safety and reliability of the NPP beyond 30 years of nominal operation. In this study, the synergistic effect of a creep mechanism with the alteration suffered by piping material is analyzed by means of MSC©MARC finite element code. Nonlinear analyses were performed to calculate the effects of the long operational period on a primary pipe, assess its degradation, and determine its residual functionality. In these analyses, both homogeneous and inhomogeneous pipe wall thinning are considered, as well as the operating or expected thermal–mechanical loads. The obtained results indicate that thermo–mechanical loads are responsible for pipe deformation, which develops and increases as the transient progresses. Furthermore, an excessive (general or local) wall thinning may determine a dimensional change of the pipe, even causing bending or buckling.

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Section: Introductionsupporting

confidence: 84%

Preliminary Analysis of Long-Term Performance of a Piping: Aging and Creep Effects

Cancemi

Frano

2021

Materials

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“…Metallographic etching was carried out in aqueous 10% (wt.) oxalic acid solution, by applying a current density of 1 A cm -2 for 20 s. This procedure is known to selectively outline microstructure heterogeneities, such as interphases and grain boundaries, and in particular areas with higher chromium contents [16][17][18] . The latter etching procedure is applied to reveal Cr-enriched regions at ferrite/austenite interfaces, grain boundaries, as well as intragranular precipitates, such as chromium-nitrides.…”

Section: Methodsmentioning

confidence: 99%

Corrosion Assessment of ASME Qualified Welding Procedures for Grade 2101 Lean Duplex Stainless Steel

et al. 2019

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ASME qualified welding procedures do not guarantee suitable corrosion and passivation properties for lean duplex stainless steel welds. An evaluation of two ASME qualified welding procedures to optimize the corrosion performance of tungsten inert gas (TIG) welded grade 2101 duplex stainless steel using ER2209 weld consumable was conducted. The evolution of the microstructure was examined by optical and electron microscopy, ferrite-scope measurements, and scanning Kelvin probe force microscopy. An electrochemical mini-cell was then used to characterize the electrochemical behavior of different weld regions using the techniques such as the double loop electrochemical potentiokinetic reactivation test, standard potentiodynamic polarization tests, and cyclic potentiodynamic polarization. The fusion line was the most critical zone for localized corrosion for both welding procedures, due to the formation of Cr- and Mo-depleted zones, resulting in the highest degree of sensitization. The best performance was attributed to the weld face, due to the presence of higher Cr and Mo contents, highlighting the pitting corrosion resistance. A heat input range of 1.6 kJ/mm to 1.9 kJ/mm and low current density (WPS 1) indicated better corrosion performance of all weld regions. The electrochemical corrosion response was in all cases related to microstructural characteristics of the weld regions. The influence of weld parameters on microstructure development and corrosion performance is discussed.

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“…Presently, there are some categories of DSS that are grouped according to their values of pitting resistance equivalent number, such as standard duplex, lean duplex, hyper duplex, and super duplex. 5,6 With regard to biomedical applications, studies 7,8 have shown that the corrosion behavior of DSS is better than that of 316L stainless steel (SS) under potentiodynamic conditions. The implant’s life in the human body increases when the implant has a high corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Biomineralization of 2304 duplex stainless steel with surface modification by electrophoretic deposition

Hammood

2020

Journal of Applied Biomaterials & Functional Materials

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A hydroxyapatite (HAp) coating on 2304 duplex stainless steel (DSS) through an electrophoretic deposition process has been investigated in this work. The deposition voltage was 30 V with a time of 2 min. Field emission scanning electron microscopy and energy dispersive X-ray spectroscopy analyses were used for the microstructural and chemical examination of coatings, respectively. The Ca to P ratio for the nano HAp coating on 2304 DSS has been determined as equal to 1.642. It was observed from X-ray diffraction patterns that HAp nanoparticles were successfully combined into the substrate. The corrosion behavior of all samples was tested in simulated body fluid using a potentiodynamic polarization study. A homogeneous structure with a thin crack-free layer was obtained. Moreover, the porosity of this coating was very low leading to a high corrosion resistance, thus promoting good biocompatibility.

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Thermal aging at 475 °C of newly developed lean duplex stainless steel 2404: Mechanical properties and corrosion behavior

Cited by 37 publications

References 42 publications

Preliminary Analysis of Long-Term Performance of a Piping: Aging and Creep Effects

Preliminary Analysis of Long-Term Performance of a Piping: Aging and Creep Effects

Corrosion Assessment of ASME Qualified Welding Procedures for Grade 2101 Lean Duplex Stainless Steel

Biomineralization of 2304 duplex stainless steel with surface modification by electrophoretic deposition

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