Environmental Degradation of Dissimilar Austenitic 316L and Duplex 2205 Stainless Steels Welded Joints

Topolska, Santina; Łabanowski, Jerzy

doi:10.1515/amm-2017-0312

Cited by 13 publications

(3 citation statements)

References 12 publications

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“…The microstructure observed in this first BP specimen has not previously been reported in any studies on AM of duplex stainless steel. However, it resembles the microstructure which can be observed at the fusion boundary and in the heat-affected zone of welded 2205 duplex stainless steel [13,14]. The second BP specimen, produced with a reduced speed was found to have a distinct microstructure, where each deposited layer and track could be distinguished from each other, as shown in Figures 5 (c) and (d).…”

Section: Resultsmentioning

confidence: 76%

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Optimization of Laser Metal Deposition Process for 2205 Duplex Stainless Steel

Arbo

Saai

Sørli

et al. 2022

KEM

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This work aims to optimize the process parameters for laser based DED manufacturing of a water jet impeller with critical requirements to material and mechanical properties. The concerned material is 2205 duplex stainless steel with balanced ferrite-austenite microstructure. The optimization approach of the processing parameters relies on the assessment of their effect on microstructure and mechanical properties versus the requirements set by the maritime industry. The work aims to achieve an as-built microstructure with the required ferrite-austenite balance and mechanical properties, without the need for post-processing heat treatment. The work particularly focuses on the influence of the deposition speed of the DED process. The results show that duplex stainless steel with a 50-50 ferrite-austenite balance can be achieved directly from the DED process. A high deposition speed produced fine-grained microstructure resulting in a high tensile strength and toughness, well above the set requirements. However, it reduced the ductility, represented by tensile elongation due to the formation of welding defects. Reducing the deposition speed by 20% eliminated the welding defects but resulted in the formation of a distinct microstructure with coarse grains, elongated in the deposited layer. This microstructure improved the tensile elongation, but strongly reduced the toughness, represented by Charpy V impact energy values. The coarse grains in the deposited layer facilitated a fast fracture propagation initiated by the placement of the Charpy V notch. However, the presented results demonstrate the great potential for manufacturing duplex stainless steels by DED, where a suitable microstructure for optimal mechanical performance can be obtained by narrowing the optimization windows on the process parameters.

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Section: Resultsmentioning

confidence: 76%

mentioning

confidence: 83%

Optimization of Laser Metal Deposition Process for 2205 Duplex Stainless Steel

Arbo

Saai

Sørli

et al. 2022

KEM

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“…Non-destructive testing must be supported by the results of destructive tests under realreflective conditions. An example is the study of corrosion fatigue, crack growth studies and environmental degradation of joints [10,11].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Monitoring of Aircraft Based on the Corrosion Prognostic Health Management (CPHM) System

Ciężak¹,

Rdzanek²

2020

Journal of KONBiN

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The article presents methods to monitor the actual state of aircraft’s airframe, in particular, the onset of corrosion. The greatest emphasis is put on the “Corrosion Prognostic Health Management” CPHM system. Authors discuss corrosion detection using NDT methods as well as the possibilities of forecasting methods for estimating the onset of corrosion basing on the data gathered by means corrosion sensors. Based on the results of the previous research and analyses, authors focus on monitoring the internal microclimate and the factors causing corrosion in the aspect of damage tolerance operation of the aircraft. The results of the preliminary studies giving credibility to the concepts of predicting corrosion onset in the aircraft structure are presented. Preliminary results of tests carried out in supervised flights are also presented. The final part of the article presents the concept of modernizing the corrosion field site in order to use it in hermetic and non-hermetic tests of aircraft spaces.

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Sulfide stress corrosion (SSC) susceptibilities of duplex stainless steels 2205 produced by powder metallurgy (HIP) and hot rolling

Barros,

Tavares,

Pimenta

et al. 2024

Materials & Corrosion

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Owing to their excellent properties, duplex stainless steels (DSSs) may be selected for the H2S environment. Operational limits are not defined and depend on fabrication processes. In this work, the susceptibilities of two DSSs 2205 to sulfide stress corrosion (SSC) in saline solutions with three pH levels were investigated. The difference between materials is the fabrication route: hot rolled (HR) tubes and powder metallurgy with compacting and sintering final operations by hot isostatic pressing (PM‐HIP). The susceptibility parameters were evaluated by slow strain rate tensile tests (SSRT). Both materials suffered embrittlement in solutions with pH 3.5 and 4.5, but the susceptibility was slightly better in the HR. In the solution with pH 5.5, the HR fractured with ductile behavior, while the PM‐HIP was brittle. The better resistance of HR to SSC can be explained by microstructural features, such as the lower grain size and austenite island interspace.

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Environmental Degradation of Dissimilar Austenitic 316L and Duplex 2205 Stainless Steels Welded Joints

Cited by 13 publications

References 12 publications

Optimization of Laser Metal Deposition Process for 2205 Duplex Stainless Steel

Optimization of Laser Metal Deposition Process for 2205 Duplex Stainless Steel

Corrosion Monitoring of Aircraft Based on the Corrosion Prognostic Health Management (CPHM) System

Sulfide stress corrosion (SSC) susceptibilities of duplex stainless steels 2205 produced by powder metallurgy (HIP) and hot rolling

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