Dissimilar Welding between 2205 Duplex Stainless Steel and API X52 High Strength Low Alloy Steel

Belkessa, Brahim; Miroud, Djamel; Cheniti, Billel; Ouali, Naima; Hakem, Maamar; Djama, Mustapha

doi:10.4028/www.scientific.net/df.18.7

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…17c, these new grains are ferritic grains (green color). This last observation is in agreement with that of Belkassa et al [14] who conducted research on the welding of a DSS with high mechanical strength steel. They found that in HAZ of DSS, the region close to the fusion line contains a high proportion of ferrite.…”

Section: Fz/haz2supporting

confidence: 92%

“…This is an area devoid of pearlite. The same area was observed by Belkassa et al [14] when studying the welding of low alloyed steel with duplex stainless steel. It is explained by the fact that the molten metal is richer in Cr and that the latter has a strong affinity for carbon, which promotes the migration of carbon from the base metal to the fusion zone during welding.…”

Section: Microstructural Evolution During Isothermal Treatment At 200...supporting

confidence: 72%

“…They concluded that the fusion zone is the main zone which is affected by the change in the type of filler metal. Belkessa et al [14] investigated the microstructure and mechanical behavior of dissimilar metal welding between duplex stainless steel 2205 (UNS 31803) and high strength low alloy steel API X52. The assembly was carried out by a process of arc welding under protection.…”

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment on the welded joint of X70 steel joined to duplex stainless steel by gas tungsten arc welding

Beziou

Hamdi

Boumerzoug

et al. 2023

Int J Adv Manuf Technol

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The objective of this work is to study the microstructure and the texture evolution in welded joint of X70 steel with duplex stainless steel joined by gas tungsten arc welding (GTAW) process and heat treated at 200 °C and 600 °C. Then, the microstructural evolutions are correlated to their hardness mechanical property. The characterization techniques used are optical microscopy, scanning electron microscopy, EDS, Vickers microhardness, tensile tests, X-ray diffraction, and electron backscatter diffraction (EBSD) technique. Two heat affected zones were observed in welded joint with different microstructures. Heat affected zone on the X70 steel side and another on the duplex stainless steel side. A solidification microstructure was observed in the fusion zone such elongated ferritic grains and a growth direction < 100 > was found. The most microstructural transformations were observed in the vicinity of the interface which connects the heat affected zone to the fusion zone either on the X70 steel side or on the duplex stainless steel side. The effect of heat treatment on the hardness of the welded joint was noticed in the side of the duplex stainless steel. The fusion zone is the hardest zone of the welded joint (309.4 Hv) and which is not affected by the applied heat. X-ray diffraction analysis did not reveal the formation of new phases after the heat treatments applied to the welded joint. The tensile tests have shown that the welded joint treated at 200 C presents the highest value of ultimate tensile strength (667 MPa).

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Section: Fz/haz2supporting

confidence: 92%

Section: Microstructural Evolution During Isothermal Treatment At 200...supporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of heat treatment on the welded joint of X70 steel joined to duplex stainless steel by gas tungsten arc welding

Beziou

Hamdi

Boumerzoug

et al. 2023

Int J Adv Manuf Technol

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“…In this case, there was an interdiffusion process, because the atoms of iron diffuse from the X70 steel to the DSS, however, the atoms of chromium and nickel diffuse from the DSS to X70 steel. Belkessa et al [31] revealed a high concentration gradient of alloying elements (Cr, Ni and Mo) in welded duplex stainless steel and low alloy steel. Based on the measured values given in Table 2 and calculated from equation ( 5), the diffusion coefficient values of 'Cr', 'Ni', and 'Fe' were calculated for the same diffusion distance x = 30 μm (Table 3).…”

Section: )mentioning

confidence: 99%

Solid State Diffusion Bonding of X70 Steel to Duplex Stainless Steel

Boumerzoug

Baghdadi

Brisset

et al. 2022

Acta Metall Slovaca

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This paper deals with the solid state diffusion bonding of X70 steel to duplex stainless steel. Microstructure and mechanical properties of the welded dissimilar steels were investigated. Optical microscopy, Electron Backscatter Diffraction, energy dispersive spectrometry, Vickers hardness measurements, and X-Ray Diffraction were the main techniques of characterization. Microtructural variation was observed in the X70 steel side compared to duplex stainless steel. The diffusion coefficient of iron, chromium, and nickel across the interface X70 steel/duplex stainless steel was also measured. The diffusion coefficient of iron and chromium is higher than that of nickel. The Vickers microhardness profile across the bond joint showed an abrupt decrease in hardness from duplex stainless steel to X70 steel. In addition, a dynamic recrystallisation reaction was observed close to the interface in the X70 steel side.

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“…Low carbon steel normally has good weldability, and the welding of high strength steels produces a softened zone where the strain is concentrated making it vulnerable to HSC initiation. Furthermore, the welding microstructures have high hardness, such as MA constituent and martensite, accelerate hydrogen embrittlement [16][17][18]. In the case of dissimilar-welded joints in DSS and carbon steel, the ferrite phase fraction is increased in the heat affected zone (HAZ) of the DSS and the softened HAZ of high-strength carbon steels.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Stress Cracking Behaviour in Dissimilar Welded Joints of Duplex Stainless Steel and Carbon Steel

Park

Moon

et al. 2021

Metals

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As the need for duplex stainless steel (DSS) increases, it is necessary to evaluate hydrogen stress cracking (HSC) in dissimilar welded joints (WJs) of DSS and carbon steel. This study aims to investigate the effect of the weld microstructure on the HSC behaviour of dissimilar gas-tungsten arc welds of DSS and carbon steel. In situ slow-strain rate testing (SSRT) with hydrogen charging was conducted for transverse WJs, which fractured in the softened heat-affected zone of the carbon steel under hydrogen-free conditions. However, HSC occurred at the martensite band and the interface of the austenite and martensite bands in the type-II boundary. The band acted as an HSC initiation site because of the presence of a large amount of trapped hydrogen and a high strain concentration during the SSRT with hydrogen charging. Even though some weld microstructures such as the austenite and martensite bands in type-II boundaries were harmless under normal hydrogen-free conditions, they had a negative effect in a hydrogen atmosphere, resulting in the premature rupture of the weld. Eventually, a premature fracture occurred during the in situ SSRT in the type-II boundary because of the hydrogen-enhanced strain-induced void (HESIV) and hydrogen-enhanced localised plasticity (HELP) mechanisms.

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Dissimilar Welding between 2205 Duplex Stainless Steel and API X52 High Strength Low Alloy Steel

Cited by 9 publications

References 15 publications

Effect of heat treatment on the welded joint of X70 steel joined to duplex stainless steel by gas tungsten arc welding

Effect of heat treatment on the welded joint of X70 steel joined to duplex stainless steel by gas tungsten arc welding

Solid State Diffusion Bonding of X70 Steel to Duplex Stainless Steel

Hydrogen Stress Cracking Behaviour in Dissimilar Welded Joints of Duplex Stainless Steel and Carbon Steel

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