The effects of filler metal and butter layer on the microstructure and mechanical properties of API 5L X65/AISI 304L joint

Asadollahi, Ayoub; Bahrami, Abbas; Shamanian, M.

doi:10.1016/j.jmrt.2023.02.063

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…More recently, Asadollahi et al [30] have investigated the effects of three different filler metals (ER308L, ER309L and ERNiCr3) in GTAW of the dissimilar plates API 5L X65 and AISI 304 L (10 mm thick). Before welding, the ferritic steel edge was prepared with a buttering layer (6 mm thick), through GTAW passes with ERNiCr3 filler wire.…”

Section: Electric Arc Weldingmentioning

confidence: 99%

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

Preprint

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Dissimilar welds between ferritic and austenitic steels represent a good solution for exploiting the best performance of stainless steels at high and low temperatures and in aggressive environments, while minimizing costs. Therefore, they are widely used in nuclear and petrochemical plants, however, due to the different properties of the steels involved, the welding process can be challenging. Fusion welding can be specifically addressed to connect low-carbon, or low-alloy steels, with high-alloy steels, which have similar melting point. Welding of thick plates can be performed with electric arc in multiple passes or in a single pass by means of a laser beam equipment. Since microstructure and consequently mechanical properties of the weld are closely related to composition, the choice of the filler metal and processing parameters, which in turn affects the dilution rate, plays a fundamental role. Numerous technical solutions were proposed for welding dissimilar steels and much research was developed on the weldment metallurgy; therefore, this article is aimed at a review of the most recent scientific literature on the issues relating to the fusion welding of ferritic / austenitic steels. Two specific sections are dedicated respectively to electric arc and laser beam welding; finally, metallurgical issues, related to dilution and thermal field are debated in the discussion section.

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Section: Electric Arc Weldingmentioning

confidence: 99%

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…However, it is always necessary to consider the effects of all the parameters that characterize the welding process on which dilution depends. References [26,29,30] can be cited as examples of buttering techniques. In [26], to compensate dilution, SS309L electrodes were used for depositing a layer rich of Ni and Cr on References [26,29,30] can be cited as examples of buttering techniques.…”

Section: Electric Arc Weldingmentioning

confidence: 99%

“…References [26,29,30] can be cited as examples of buttering techniques. In [26], to compensate dilution, SS309L electrodes were used for depositing a layer rich of Ni and Cr on References [26,29,30] can be cited as examples of buttering techniques. In [26], to compensate dilution, SS309L electrodes were used for depositing a layer rich of Ni and Cr on the carbon steel edge; subsequently, SS308L electrodes were used to join two dissimilar plates (SA 516 and AISI 304L) by SMAW.…”

Section: Electric Arc Weldingmentioning

confidence: 99%

“…More recently, Asadollahi et al [30] have investigated the effects of three different filler metals (ER308L, ER309L, and ERNiCr3) in the GTAW of the dissimilar plates API 5L X65 and AISI 304 L (10 mm thick). Before welding, the ferritic steel edge was prepared with a buttering layer (6 mm thick), through GTAW passes with an ERNiCr3 filler wire.…”

Section: Electric Arc Weldingmentioning

confidence: 99%

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A Review on Fusion Welding of Dissimilar Ferritic/Austenitic Steels: Processing and Weld Zone Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

JMMP

View full text Add to dashboard Cite

Dissimilar welds between ferritic and austenitic steels represent a good solution for exploiting the best performance of stainless steels at high and low temperatures and in aggressive environments, while minimizing costs. Therefore, they are widely used in nuclear and petrochemical plants; however, due to the different properties of the steels involved, the welding process can be challenging. Fusion welding can be specifically applied to connect low-carbon or low-alloy steels with high-alloy steels, which have similar melting points. The welding of thick plates can be performed with an electric arc in multiple passes or in a single pass by means of laser beam equipment. Since the microstructure and, consequently, the mechanical properties of the weld are closely related to the composition, the choice of the filler metal and processing parameters, which in turn affect the dilution rate, plays a fundamental role. Numerous technical solutions have been proposed for welding dissimilar steels and much research has developed on welding metallurgy; therefore, this article is aimed at a review of the most recent scientific literature on issues relating to the fusion welding of ferritic/austenitic steels. Two specific sections are dedicated, respectively, to electric arc and laser beam welding; finally, metallurgical issues, related to dilution and thermal field are debated in the discussion section.

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Role of buttering layer composition on microstructural heterogeneity and mechanical properties of Alloy 617 and P92 steel dissimilar welded joints for future Indian AUSC program

Rathore,

Kumar,

Sirohi

et al. 2024

Int J Adv Manuf Technol

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Restrictive operating conditions (even exceeding 700 °C) of materials in advanced ultra super critical (AUSC) power plants and the need to minimize manufacturing and maintenance costs require the production of dissimilar metal welded joints (DMW). Significant differences in the physical and chemical properties of welded materials lead to phenomena that reduce the weldability of the metals used and force the search for solutions that limit unfavorable phenomena, e.g., the use of buttering layers. The study presents a comparison of two types of joints with Alloy 617 (UNS N06617) and ferritic P92 (UNS K92460) steel made using Inconel 82 (ENiCrFe-3) and Inconel 617 (ERNiCrCoMo-1) alloys buttering layer and the corresponding chemical composition of filler metals. All areas of the joints made with the gas tungsten arc welding process were subjected to structural investigations (optical microscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) and mechanical tests (microhardness, room and high temperature tensile, and toughness testing). Despite the more complicated welding procedure, sound welded joints were obtained with favorable properties resulting, inter alia, from the reduced thickness of the martensite layer in HAZ of P92 steel and the limited diffusion of alloy components compared to welded joints without the buttering layer. This also resulted in a reduction of the maximum hardness (especially in the case of Inconel 82 buttering—by 15–30 HV0.5 in comparison with Inconel 617 buttering) and an increase in strength while limiting the decrease in plasticity (even 663 MPa tensile strength and 21% of elongation for Inconel 617 buttered joint). Moreover, improved high-temperature performance (approximately 70–100 MPa) of the welded joint following the application of the buttering layer was confirmed. The presented results allow for drawing general conclusions that both proposed welding procedures can be recommended for use in the working conditions occurring at AUSC.

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The effects of filler metal and butter layer on the microstructure and mechanical properties of API 5L X65/AISI 304L joint

Cited by 11 publications

References 32 publications

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

A Review on Fusion Welding of Dissimilar Ferritic/Austenitic Steels: Processing and Weld Zone Metallurgy

Role of buttering layer composition on microstructural heterogeneity and mechanical properties of Alloy 617 and P92 steel dissimilar welded joints for future Indian AUSC program

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