Simulation and Experimental Validation of EBW Studies in Austenitic Stainless Steel AISI-321

Anupamadev, A. P.; Kumar, Vineet; Gupta, Rohit; Rubaai, A.; Kumar, Ravi Ranjan

doi:10.1007/s41403-020-00099-6

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…In recent years, with the advancement of computer technology, numerical simulation has been widely applied in the field of welding, significantly improving research efficiency and precision while also optimizing welding processes and quality control. Many scholars have combined numerical simulation with experimental studies on the temperature field, deformation field, and stress field of weldments [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. For instance, Liu [ 39 ] and others combined experiments and simulations to study the microstructure and residual stress of narrow-gap laser welding of TC4 titanium alloy, finding that the growth direction of crystals in different areas aligned with the temperature gradient and noted the high transverse tensile stress near the interlayers.…”

Section: Introductionmentioning

confidence: 99%

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

Hou,

Guo,

Wang

et al. 2024

Materials

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Ultra-thick offshore steel, known for its high strength, high toughness, and corrosion resistance, is commonly used in marine platforms and ship components. However, when offshore steel is in service for an extended period under conditions of high pressure, extreme cold, and high-frequency impact loads, the weld joints are prone to fatigue failure or even fractures. Addressing these issues, this study designed a narrow-gap laser wire filling welding process and successfully welded a 100-mm new type of ultra-thick offshore steel. Using finite element simulation, EBSD testing, SEM analysis, and impact experiments, this study investigates the weld’s microstructure, impact toughness, and fracture mechanisms. The research found that at −80 °C, the welded joint exhibited good impact toughness (>80 J), with the impact absorption energy on the surface of the weld being 217.7 J, similar to that of the base material (225.3 J), and the fracture mechanism was primarily a ductile fracture. The impact absorption energy in the core of the weld was 103.7 J, with the fracture mechanism mainly being a brittle fracture. The EBSD results indicated that due to the influence of the welding thermal cycle and the cooling effect of the narrow-gap process, the grains gradually coarsened from the surface of the welded plate to the core of the weld, which was the main reason for the decreased impact toughness at the joint core. This study demonstrates the feasibility of using narrow-gap laser wire filling welding for 100-mm new type ultra-thick offshore steel and provides a new approach for the joining of ultra-thick steel plates.

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Section: Introductionmentioning

confidence: 99%

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

Hou,

Guo,

Wang

et al. 2024

Materials

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FEA Comparative Studies on Heat Flux and Thermal Stress Analysis during Conduction Mode and Keyhole Mode in the Laser Beam Welding

Vemanaboina¹,

Akella²,

Buddu³

2021

Light Weight Materials

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Effect of Different Mig Welding Modes on Hard-Facing of Inconel 718 on 321 Stainless Steel

Karpagaraj¹,

Sarala

Manivannan

et al. 2022

Surf. Rev. Lett.

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In this study, the metal inert gas (MIG) welding process is taken to deposit the Inconel 718 material on 321 stainless steel. Various modes like the DC, DC-pulsed, and DC-wave-pulsed modes in MIG welding are used for depositing Inconel 718. The primary parameters such as the welding current (90–120[Formula: see text]A) and speed (150–350[Formula: see text]mm/min) are varied within the range for making the layer deposition over 321 stainless steel. After performing the layer deposition, the dilution, contact angle, and peak temperature are analyzed to find the optimal MIG welding mode. From the macrograph, very low dilution (7.44%) is identified for the DC mode. The most inferior contact angle ([Formula: see text]) of [Formula: see text] was measured for the DC-wave-pulsed mode. The simulation work predicted a peak temperature of [Formula: see text]C for the DC mode. Considerable microstructure changes have occurred at the weld deposition (dendritic structure) and HAZ (grain coarsening) for all the three modes. At the top, interface, and HAZ locations, the microhardness obtained from the DC-pulsed mode is in between those of the DC and DC-wave-pulsed modes. Overall, the DC-pulsed mode is qualified for making the metal deposition and further work. For 50% overlap, defect-free 2-mm-thick layer depositions are made on the 321 stainless steel surfaces.

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Simulation and Experimental Validation of EBW Studies in Austenitic Stainless Steel AISI-321

Cited by 3 publications

References 17 publications

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

FEA Comparative Studies on Heat Flux and Thermal Stress Analysis during Conduction Mode and Keyhole Mode in the Laser Beam Welding

Effect of Different Mig Welding Modes on Hard-Facing of Inconel 718 on 321 Stainless Steel

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