Prediction of temperature field and residual stress of oscillation laser welding of 316LN stainless steel

Yan, Shenghong; Meng, Ziyan; Chen, Bo; Tan, Caiwang; Song, Xiaoguo; Guo-dong, Wang

doi:10.1016/j.optlastec.2021.107493

Cited by 35 publications

(19 citation statements)

References 31 publications

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“…At first glance, the microstructure of the weld seam metal is the classic microstructure of a weld seam from 316L steel, obtained by laser welding, found among other authors [1,10,11] (Figure 9). All passes have a different crystallization direction; the higher the pass number, the more the dendrites are directed upward.…”

Section: Microstructure and Microhardnessmentioning

confidence: 72%

“…In turn, the cooling rates depend on the selected type of welding [4], welding modes [5,6], and the presence of concurrent heating [3,4,7] or cooling during welding or recovery cladding [8]. Additionally, the phase composition can vary in depth of the weld seam (top, middle, and bottom parts of the seam), for example, when welding with a defocused laser beam or laser beam using the longitudinal wobbling mode [9][10][11]. That also has a significant influence on the performance properties of products.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Laser Beam Wobbling Parameters on Microstructure and Properties of 316L Stainless Steel Multi Passed Repaired Parts

et al. 2022

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The results of experimental studies of repair of the supporting structure components made of 316L steel multi-pass laser cladding with filler wire are presented. The influence of the wobbling mode parameters, welding speed, and laser power on the formation of the deposited metal during multi-pass laser cladding with filler wire of 316L steel samples into a narrow slot groove, 6 mm deep and 3 mm wide, are shown. Non-destructive testing, metallographic studies, and mechanical tests of the deposited metal before and after heat treatment (2 h at 450 °C) were carried out. Based on the results of experimental studies, the optimal modes of laser beam wobbling were selected (amplitude—1.3 mm, frequency—100 Hz) at which the formation of a bead of optimal dimensions (height—1672 μm, width—3939 μm, depth of penetration into the substrate—776 μm) was ensured. A laser cladding technology with ESAB OK Autrode 316L filler wire has been developed, which has successfully passed the certification for conformity with the ISO 15614-11 standard. Studies of the chemical elements’ distribution before and after heat treatment showed that, after heat treatment along the grain boundaries, particles with a significantly higher Mo content (5.50%) were found in the sample, presumably precipitated phases. Microstructure studies and microhardness measurements showed that the upper part metal of the third pass, which has a lower microhardness (75% of base metal), higher ferrite content, and differently oriented dendritic austenite, significantly differs from the rest of the cladded metal.

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Section: Microstructure and Microhardnessmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Influence of Laser Beam Wobbling Parameters on Microstructure and Properties of 316L Stainless Steel Multi Passed Repaired Parts

et al. 2022

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“…As the energy is not uniformly distributed on both sides of the joint with unequal thickness, misalignment occurs in the joints under nonuniform heat stress. The misalignment of the bottom surface in the NEBW and SEBW joints is more severe than that in the CEBW and IEBW joints for the different stress distribution caused by different scanning patterns [ 36 ]. Severe welding misalignment in the iris region greatly influences the frequency of the cavity, so welding with circular or infinity oscillation appears to be preferable for the iris weld to avoid large welding distortion.…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness

Tao

Liu

et al. 2022

Materials

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The electron beam welding of the tubes and the half-cells for our 1.3 GHz single-cell superconducting radiofrequency (SRF) cavities is complex due to the different thicknesses of the tubes and the half-cells in the iris region. However, the mechanical properties and microstructure of the iris welds in niobium SRF cavities have barely been explored in previous studies. For high-quality iris welds, welding experiments of niobium sheets of 2 mm and 2.8 mm were carried out under different oscillating conditions. The results show that welding with no oscillation or sinusoidal oscillation may not be applied in actual welding owing to the large misalignment of the bottom surface. The weld grains were not significantly refined through beam oscillation. The joints with infinity oscillation had a higher elongation than circular oscillation, which exhibited a brittle fracture in the tensile tests at 77 K. Nevertheless, the texture of the weld with infinity oscillation implies poor formability, so the feasibility of infinity oscillation in actual welding needs verification in future study.

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“…However, the simulation results of the maximum width of the molten pool and the maximum width of the heat-affected zone on the steel side are equivalent to the actual size. Therefore, the simulation model is reasonable for calculating and analyzing the temperature field of steel and magnesium laser welding [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Laser Welding Parameters on Joint Structure of AZ31B Magnesium Alloy and 304 Stainless Steel

Wan

Zhang

et al. 2022

Materials

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The effects of laser welding parameters on the interface microstructure of AZ31B magnesium alloy and 304 stainless steel were investigated. After welding, a scanning electron microscope and ultra-depth of field microscope were used to observe the microstructure of the welded material, to analyze the effects of power on the interface morphology. The simulation of laser welding of magnesium and steel was carried out by the COMSOL software. The results showed that when the power was 15 W–20 W, the temperature did not reach the melting point of magnesium alloy, there was MgO at the welding, and the interface had poor connection strength. When the power was 35 W–50 W, the temperature reached or even exceeded the boiling point of magnesium alloy, and the interface formed hot cracks, pores, and oxides and had poor joint strength. When the power was 25 W–30 W, the temperature was between the melting point and boiling point of magnesium, and the interface had excellent connection strength.

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Prediction of temperature field and residual stress of oscillation laser welding of 316LN stainless steel

Cited by 35 publications

References 31 publications

Influence of Laser Beam Wobbling Parameters on Microstructure and Properties of 316L Stainless Steel Multi Passed Repaired Parts

Influence of Laser Beam Wobbling Parameters on Microstructure and Properties of 316L Stainless Steel Multi Passed Repaired Parts

Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness

Effect of Laser Welding Parameters on Joint Structure of AZ31B Magnesium Alloy and 304 Stainless Steel

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