Numerical prediction and experimental analysis of the residual stress fields and generated distortion in hybrid laser/arc welded thick plates of high-strength steels

Yazdian, Nima; Derakhshan, Ehsan Dezhparvar; Kovacevic, Radovan

doi:10.1007/s00170-018-2404-0

Cited by 11 publications

(2 citation statements)

References 19 publications

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“…In 2015, experimental investigation on residual stress of a few welded H-sections with 16 mm HSS 960 MPa was reported by (Li et al, 2015). Recently, more and more research has been conducted for HSS with 690 MPa or even higher yield strength, such as Liu and Chung (Liu and Chung, 2018), Yazdian et al (Yazdian et al, 2018), Li et al (Li et al, 2020), Su et al (Su et al, 2021). andGhafouri et al (Ghafouri et al, 2022) It can be found that most of the previous researches on residual stress of welded HSS H-sections refer to steel grade about 460 MPa.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on residual stress distributions in welded H-sections of High-strength steel

Tong

Wang

et al. 2023

Advances in Structural Engineering

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High-strength steel (HSS) has been increasingly applied in structural engineering, while the work on residual stress of HSS sections is still insufficient. Limited research is available for welded H-sections above 690 MPa while with a plate thickness of more than 10 mm. This paper deals with the residual stress distributions of welded H-sections with flame-cut edges, which are fabricated from HSS plates with yield strength of 690 MPa and 960 MPa and thickness of 10 mm–20 mm, using both experimental and numerical method. The experiments showed that the welded tensile residual stresses in the weld region are not significantly affected by sectional dimensions and steel grade. Verified by comparing with the experimental results, three-dimensional (3D) finite element (FE) models using sequentially coupled thermal-stress analysis was adopted for parametric study of compressive residual stress of welded H-sections made of 690 MPa HSS. The results showed that the compressive tensile stress is negatively correlated with plate thickness as well as width-thickness ratio. Through regression analysis, formulae were proposed for estimation of compressive residual stress in the flange and web, respectively. Finally, residual stress distribution model was developed, which was proved effective by comparing with the experimental and FE results.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on residual stress distributions in welded H-sections of High-strength steel

Tong

Wang

et al. 2023

Advances in Structural Engineering

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“…It was found that the penetration of the welded joint is larger and the width is smaller when the droplet impact is considered. Ya et al [22] established a 3D mathematical model for laser-arc composite welding of high strength steel to simulate the deformation and residual stress of a steel plate after welding. The model considers the convection and radiation effects of the material, but ignores the conduction of heat of the fixture.…”

Section: Introductionmentioning

confidence: 99%

Effect of Weld Pool Flow and Keyhole Formation on Weld Penetration in Laser-MIG Hybrid Welding within a Sensitive Laser Power Range

Jing

Hou

et al. 2022

Applied Sciences

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The weld penetration variation in laser-MIG hybrid welding under sensitive laser power range was investigated by welding experiments and CFD (computational fluid dynamics) simulation. During this investigation, joints of AH36 sheets were welded with varying laser powers by the laser-MIG hybrid welding process. In addition, the CFD model was established based on experimental parameters and measurement results. Moreover, surface tension, electromagnetic force, buoyancy, recoil pressure, evaporative condensation, evaporative heat exchange, melt drop transfer, and other factors were considered. The influence of various factors on molten pool depth and keyhole depth were studied, including temperature, velocity, and flow direction of liquid metal. The results show that the weld-forming effect is better at the laser power is 7.5 kW in the range of sensitive laser power. After the keyhole is formed, its depth gradually entered the stage of linear increase, oscillation increase, and oscillation balance. Increasing the laser power can effectively shorten the time of the two growth stages and allow the keyhole to enter the balance stage earlier. During the oscillation balance state of the keyhole, the molten metal under the keyhole flowed to the molten pool root in the reverse direction of welding; it can also promote weld penetration.

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Numerical Prediction of Residual Stress and Temperature Field in TIG Welding

Anandhu¹,

Sarath²,

Pabin³

et al. 2022

Springer Proceedings in Materials

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Numerical prediction and experimental analysis of the residual stress fields and generated distortion in hybrid laser/arc welded thick plates of high-strength steels

Cited by 11 publications

References 19 publications

Experimental and numerical study on residual stress distributions in welded H-sections of High-strength steel

Experimental and numerical study on residual stress distributions in welded H-sections of High-strength steel

Effect of Weld Pool Flow and Keyhole Formation on Weld Penetration in Laser-MIG Hybrid Welding within a Sensitive Laser Power Range

Numerical Prediction of Residual Stress and Temperature Field in TIG Welding

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