Dissimilar welding of high nitrogen stainless steel and low alloy high strength steel under different shielding gas composition: Process, microstructure and mechanical properties

Liu, Zeng; Fan, Chenglei; Yang, Chunli; Zhu, Ming; Lin, Sanbao; Wang, Langping

doi:10.1016/j.dt.2022.10.010

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…Thermal gradients, phase transformation, and residual strains from welding may cause HAZ twinning in welded joints. These variables cause HAZ grain crystallographic reorientations, producing twin grains as reported by Liu et al [37]. Twinning may damage the material mechanical qualities; hence welding settings must be carefully controlled.…”

Section: Microstructurementioning

confidence: 88%

Effect of TIG welding parameters on 316 L stainless steel joints using taguchi L27 approach

Khrais,

Mohammed,

et al. 2024

Mater. Res. Express

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The AISI 316L stainless steel was welded using Tungsten Inert Gas (TIG) welding, utilizing ternary shielding gases Argon (Ar), Helium (He), and Nitrogen (N2). This study aimed to assess the effects of these ternary shielding gases on the microstructure, bead profile, and bead appearance. It provides a comprehensive grasp of welding parameters' interplay with shielding gas compositions, enabling engineers to make informed choices that significantly influence the excellence, productivity, and lastingness of the welding process. The Taguchi L-27 approach was employed, incorporating different contents of N2 (2.5 vol% to 7.5 vol%) and He (10 vol% to 30 vol%) within the Ar shielding gas composition. Additionally, welding current intensities ranging from 120A to 180A were also used in the experiment. The results demonstrated that a higher content of He and N2 resulted in elevated levels of austenite-forming elements. Therefore, for TIG welding at the arc current intensity of 150A, it is recommended to utilize the shielding gas mixtures (2.5 vol.% N2 + 10 vol.% He + 87.5 vol.% Ar). Furthermore, by augmenting the content of both N2 and He within the Ar shielding gas mixture, in addition to adjusting the arc current, a notable expansion in both the width and depth of the weld profile was achieved. This achievement, in turn, played a pivotal role in securing comprehensive fusion throughout the welding process.

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Section: Microstructurementioning

confidence: 88%

Effect of TIG welding parameters on 316 L stainless steel joints using taguchi L27 approach

Khrais,

Mohammed,

et al. 2024

Mater. Res. Express

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“…Upon achieving an N 2 proportion of 20%, a complete austenitic weld was achieved, leading to an 8.7% enhancement in tensile strength. Another study by Liu et al [21] investigated the impact of using an Ar-N 2 -O 2 of ternary shielding gas in the welding of high nitrogen steel and low alloy steel. They examined various aspects such as metal transfer, nitrogen behavior, weld appearance, nondestructive testing, nitrogen distribution, microstructure, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the impact of GMAW welding parameters on the mechanical properties of AISI 316L/ER 316L using quaternary shielding gas

Khrais,

Al Hmoud,

Abdel Al

et al. 2024

Mater. Res. Express

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In this study, the parameters of Metal Inert Gas (MIG) and Metal Active Gas (MAG) were investigated of AISI 316L/ER 316L. A quaternary shielding gas mixture consisting of Argon (Ar), Helium (He), Carbon Dioxide (CO2), and Nitrogen (N2) was chosen. The Taguchi orthogonal array (OA-L9) methodology was employed to explore optimal welding settings, including arc current (120A, 160A, 200A), wire feed rate (3, 3.5, 4 m/min), and shielding gas combination (G1, G2, G3). The findings highlighted the importance of shielding gas in influencing the ultimate tensile strength (UTS), elongation percentage (EL.%), and material toughness of welding joints. Notably, the highest UTS (515.77 MPa), EL.% (20.85%), and material toughness (133J) were achieved by the specific group gas combination shown as G1. It is recommended to configure welding parameters to an arc current of 160A, a wire feed rate of 4 m/min, and the G1 gas combination. Welded specimens using a G1 gas mixture showcased the best UTS and EL.%. Additionally, it was found that the fusion zone (FZ) and heat-affected zone (HAZ) hardness are most profoundly influenced by the choice of gas combination (G2), resulting in the best hardness values of 253.79 HV and 239.68 HV, respectively. The optimal parameters for achieving the desired material hardness were precisely identified as (120A, 3 m/min, G2). These insights offer a pathway to enhance welding performance and, in turn, elevate the quality and efficiency of industrial applications.

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“…The welding quality and efficiency determine the core competitiveness of the product [ 4 ]. The traditional welding methods of thick plate steel are mainly gas-shielded welding (GSW) or submerged-arc welding (SAW), which have reduced the welding automation degree and welding efficiency and affected performance [ 5 , 6 , 7 , 8 , 9 ]. Ning et al [ 7 ] proposed that composite welding can obviously improve the tensile strength and plasticity of high-nitrogen austenitic stainless steel joints compared with metal–inert gas (MIG) welding.…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on the Formability, Microstructure, and Mechanical Properties of Laser-Arc Hybrid Welding of Q355B Steel

et al. 2023

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Thick plate steel structure is widely used in the construction machinery, pressure vessels, ships, and other manufacturing fields. To obtain an acceptable welding quality and efficiency, thick plate steel is always joined by laser-arc hybrid welding technology. In this paper, Q355B steel with a thickness of 20 mm was taken as the research object, and the process of narrow-groove laser-arc hybrid welding was studied. The results showed that the laser-arc hybrid welding method could realize one-backing and two-filling welding with the single-groove angles of 8–12°. At different plate gaps of 0.5 mm, 1.0 mm, and 1.5 mm, the shapes of weld seams were satisfied with no undercut, blowhole, or other defects. The average tensile strength of welded joints was 486~493 MPa, and the fracture position was in the base metal area. Due to the high cooling rate, a large amount of lath martensite formed in heat-affected zone (HAZ) and this zone exhibited higher hardness values. The impact roughness of the welded joint was almost 66–74 J, with different groove angles.

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Dissimilar welding of high nitrogen stainless steel and low alloy high strength steel under different shielding gas composition: Process, microstructure and mechanical properties

Cited by 8 publications

References 20 publications

Effect of TIG welding parameters on 316 L stainless steel joints using taguchi L27 approach

Effect of TIG welding parameters on 316 L stainless steel joints using taguchi L27 approach

Experimental investigation of the impact of GMAW welding parameters on the mechanical properties of AISI 316L/ER 316L using quaternary shielding gas

Effect of Process Parameters on the Formability, Microstructure, and Mechanical Properties of Laser-Arc Hybrid Welding of Q355B Steel

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