Structure–property relationships and corrosion behavior of laser-welded X-70/UNS S32750 dissimilar joint

Maurya, Anup Kumar; Pandey, Shailesh Mani; Chhibber, Rahul; Pandey, Chandan

doi:10.1007/s43452-023-00627-5

Cited by 16 publications

(1 citation statement)

References 52 publications

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“…By carefully controlling the energy input and the interaction between the different metals, it is possible to promote diffusion and reduce the formation of distinct interfaces. Additionally, post-processing techniques such as heat treatment or surface treatment processes can be applied to further refine the microstructure and properties of the printed part [ 28 , 29 ].…”

Section: Multimetal Research Based On Powder Bed Fusionmentioning

confidence: 99%

Multimetal Research in Powder Bed Fusion: A Review

et al. 2023

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This article discusses the different forms of powder bed fusion (PBF) techniques, namely laser powder bed fusion (LPBF), electron beam powder bed fusion (EB-PBF) and large-area pulsed laser powder bed fusion (L-APBF). The challenges faced in multimetal additive manufacturing, including material compatibility, porosity, cracks, loss of alloying elements and oxide inclusions, have been extensively discussed. Solutions proposed to overcome these challenges include the optimization of printing parameters, the use of support structures, and post-processing techniques. Future research on metal composites, functionally graded materials, multi-alloy structures and materials with tailored properties are needed to address these challenges and improve the quality and reliability of the final product. The advancement of multimetal additive manufacturing can offer significant benefits for various industries.

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Section: Multimetal Research Based On Powder Bed Fusionmentioning

confidence: 99%

Multimetal Research in Powder Bed Fusion: A Review

et al. 2023

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Effects of preheating on laser beam–welded NSSC 2120 lean duplex steel

Landowski,

Simon,

Breznay

et al. 2023

Int J Adv Manuf Technol

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Duplex stainless steels show sustainable alternative for the conventional austenitic grades, with higher strength, higher resistance against stress corrosion cracking, and lower purchase cost. Thus, duplex stainless steel gains more attention in construction, oil and gas, and chemical industries. Among duplex stainless steels, low nickel and low molybdenum alloyed lean duplex stainless steel are a cost-effective substitution of austenitic grades. However, keeping the balanced ferrite/austenite phase ratio in the weld metal can be challenging, mostly for autogenous and low heat input welding processes. In our research, a newly developed NSSC 2120 lean duplex stainless steel grade was welded autogenously by fiber laser welding process. Different welding parameters and preheating temperatures were used during the experiments. The welds were evaluated by microscopic and metallographic techniques, and also by electrochemical corrosion measurements. The welding parameters and the preheating temperature greatly influenced the weld shape and the austenite content in the weld metal. It was found that the focus point distance from the sheet surface had significant effect on the weld geometry. Changing the focus point distance to + 2 mm, the penetration depth increased from 4.96 to 5.53 mm, and increased the austenite content by 2.6%. Due to the preheating the welds became wider and shallower, e.g., from 4.96 to 4.08 mm penetration depth, while the cross-section are increased from 5.10 to 6.12 mm2 at the same sample. The preheating resulted in more intergranular austenite formation, which meant maximum 4% increase in the weld metal. The increasing austenite content resulted in increasing pitting corrosion resistance in 3.5% NaCl electrolyte, the highest increase was 90 mV.

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Corrosion performance of super duplex stainless steel and pipeline steel dissimilar welded joints: a comprehensive investigation for marine structures

Maurya,

Pandey,

Chhibber

et al. 2024

Int J Adv Manuf Technol

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This study investigates the corrosion behavior of dissimilar gas tungsten arc (GTA) welded joints between super duplex stainless steel (sDSS 2507) and pipeline steel (X-70) using electrochemical and immersion corrosion tests. The GTA welds were fabricated using ER2594 and ER309L filler metals. The study examined the electrochemical characteristics and continuous corrosion behavior of samples extracted from various zones of the weldments in a 3.5 wt.% NaCl solution, employing electrochemical impedance spectroscopy, potentiodynamic polarization methods, and an immersion corrosion test. EIS and immersion investigations revealed pitting corrosion in the X-70 base metal/X-70 heat-affected zone, indicating inferior overall corrosion resistance due to galvanic coupling. The corrosion byproducts identified in complete immersion comprised α-FeOOH, γ-FeOOH, Fe3O4, and Fe2O3, whereas γ-FeOOH and Fe3O4 were predominant in dry/wet cyclic conditions. Corrosion escalated with dry/wet cycle conditions while maintaining a lower level in complete immersion. The corrosion mechanism involves three wet surface stages in dry/wet cycles and typical oxygen absorption during complete immersion. Proposed corrosion models highlight the influence of Cl−, O2, and rust layers.

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Structure–property relationships and corrosion behavior of laser-welded X-70/UNS S32750 dissimilar joint

Cited by 16 publications

References 52 publications

Multimetal Research in Powder Bed Fusion: A Review

Multimetal Research in Powder Bed Fusion: A Review

Effects of preheating on laser beam–welded NSSC 2120 lean duplex steel

Corrosion performance of super duplex stainless steel and pipeline steel dissimilar welded joints: a comprehensive investigation for marine structures

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