Influence of the addition of gadolinium on the microstructure and mechanical properties of duplex stainless steel

Ahn, Jae Hoon; Jung, Hyun-Do; Im, Jae-Han; Jung, Kwang Hyo; Moon, Byung-Moon

doi:10.1016/j.msea.2016.02.005

Cited by 46 publications

(20 citation statements)

References 47 publications

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“…[1][2][3] Duplex stainless steels have been developed in response to the demand for more resistant materials in the chemical, petrochemical and oil industries. 4,5 New duplex grades with higher levels of Cr, Mo and N have been developed, as they present better localized corrosion resistance and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ferrite Phase Content on the Electrochemical Properties of Duplex Stainless Steels

Souza

Rossitti²,

Fortulan

et al. 2016

Mat. Res.

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Duplex stainless steels have a large number of industrial applications and may replace high cost materials, especially in chloride-containing environments like seawater in off-shore platforms due to their high mechanical properties and good corrosion resistance. The influence of the ferrite content on the performance of duplex stainless steels in these corrosive environments is not well known. For the present paper, new superduplex stainless steels with ferrite between 30 and 60% were developed and their microstructure and corrosion resistance were evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests in NaCl 3.5% (wt %) at 26°C and 78°C. The results obtained at 26°C showed that the pitting potential (E pitt ) is little affected by the ferrite content, but for the materials with higher ferrite it was possible to observe an increase in the repassivation potential with a decrease in the corrosion potential and passive currents due to the presence of more resistive passive films. Tests performed at 78°C indicated a high decrease in the E pitt for all the samples, independently of the ferrite percentage, although maintaining superiority in higher ferrite content. Alloys with a 55% ferrite phase content, i.e. less dependent of Ni element, present a superior performance of corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Influence of Ferrite Phase Content on the Electrochemical Properties of Duplex Stainless Steels

Souza

Rossitti²,

Fortulan

et al. 2016

Mat. Res.

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“…Consequently, the microstructure of the materials at room temperature might vary as a result of the RE addition. As an example, it influences the dissolution and precipitation process of the internal carbides of steel …”

Section: Introductionmentioning

confidence: 99%

“…As an example, it influences the dissolution and precipitation process of the internal carbides of steel. [18][19][20][21][22][23][24] Characterization of RE elements is of critical importance for their effective usage in alloys and control of their influence on the microstructures of the materials formed. The different forms of RE elements in steel can be roughly divided into two categories, namely, a combination or a solid solution.…”

Section: Introductionmentioning

confidence: 99%

Chemical states of ppm cerium in steel by ToF‐SIMS analysis

Dai

Guo

Wang

et al. 2019

Surface & Interface Analysis

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Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) was employed for an analysis of the rare earth element Ce in pure iron and steel. Secondary ion images showed that the amount of the segregation of Ce and its oxides was much less as the concentration of Ce decreased to about 11 ppm in the pure iron. In terms of depth profiling from the surface to the matrix, variation of the CeO+/Ce+ ratio in a Ce oxides sample and a pure Ce sample exhibited difference between oxidized state and metallic state. It was demonstrated that metallic Ce was presented when the ratio of CeO+/Ce+ decreased to approximately 2 and even smaller. Oxygen content with concentration of tens of ppm may influence the ratio obviously. Such ToF‐SIMS analysis was also feasible to discern the states of cerium in a Q345E steel with concentration in ppm level.

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“…One such modification that has proved very successful is adding rare earth metals (REMs) to steel/cast steel for lowering oxygen and sulphur contents [12,13] and changing the microstructure and morphology of non-metallic inclusions [13][14][15][16][17]. Adding rare earth metals to steel improves its properties [18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Fracture Energy and Fracture Morphology after Three-Point Bending Test of Welded Joints Made of Cast Steel Designed for Use in Power Sector, with and without the Addition of Rare Earth Metals

Kasińska

Skrzypczyk

2018

Metals

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Abstract:The paper reports the three-point bending test results of welded joints. The joints were made of chromium-molybdenum cast steel designed for the use at elevated temperatures. TIG (tungsten inert gas) welding technique was used. The fracture energy for particular joint zones and the stretch zone width (SZW) under the notch bottom were determined in a qualitative fracture toughness assessment. Fracture surface morphology was analyzed. The stretch zone measurement indicated a qualitative relationship between its width and the values of fracture energy. The results confirmed the influence of the modification on the character of fracture and the portions of brittle and ductile fracture in particular areas of welded joints.

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Influence of the addition of gadolinium on the microstructure and mechanical properties of duplex stainless steel

Cited by 46 publications

References 47 publications

Influence of Ferrite Phase Content on the Electrochemical Properties of Duplex Stainless Steels

Influence of Ferrite Phase Content on the Electrochemical Properties of Duplex Stainless Steels

Chemical states of ppm cerium in steel by ToF‐SIMS analysis

Fracture Energy and Fracture Morphology after Three-Point Bending Test of Welded Joints Made of Cast Steel Designed for Use in Power Sector, with and without the Addition of Rare Earth Metals

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