Numerical evaluation of surface welding residual stress behavior under multiaxial mechanical loading and experimental validations

Hemmesi, Kimiya; Mallet, Pierre; Farajian, Majid

doi:10.1016/j.ijmecsci.2019.105127

Cited by 38 publications

(13 citation statements)

References 23 publications

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“…The cooling conditions of the base plate were heat convection to air and heat conduction to the surrounding area and the work bench, while the cooling conditions of the vertical plate were heat conduction to the base plate and heat convection to air, leading to asymmetric thermal cycles. For the free-growth model, the grain size is inversely proportional to the undercooling ∆T; that is, grain growth depends only on undercooling (initial temperature) in this case [26]. The equiaxed grains appeared in the HAZ and the zone nearby the HAZ in the vertical plate, while the columnar grains appeared in the corresponding zones in the base plate, as shown in Figures 12 and 13.…”

Section: Hardness Distributionmentioning

confidence: 84%

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Study on Medium-Thick Al-Alloy T-Joints by Dual P-GMAW Bilateral Synchronous Welding

Wang

Zhang

Yan

et al. 2021

Metals

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The T-joints of medium-thick 6082 Al-alloy plates created by dual pulsed gas metal arc welding (P-GMAW) and bilateral synchronous welding were investigated to improve weld quality using the adaptive deposition method, which calculates the minimum amount of deposition according to the welding condition, groove size, and cross-sectional area, effectively reducing the heat input and deformation of the welds on the basis of weld filling. The optimized linear energy with a wire feed speed (WFS) of 9.5 m/min can ensure a well-formed weld with a complete root fusion, and high-quality T-joint welds were obtained both in root openings of 0 mm and 1 mm. The biggest penetration was 4 mm, which was four times more than that of the result from a single torch welding process. When the distance between the two welding torches exceeded 20 mm, the molten pool was completely separated, and process pores were observed in the unfused root zone. Influenced by the thermal cycles in asymmetric welding, the hardness distribution changed: the width of the softer zone at the base plate with the fore arc was smaller than that zone with the rear arc. Furthermore, dual P-GMAW bilateral synchronous welding with an asymmetric heat source can further reduce the deformation of the welded joint by about 20% compared to that of symmetric welding.

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Section: Hardness Distributionmentioning

confidence: 84%

“…The hardness distribution of the welded joint is one of the important parameters to evaluate the welding quality [26]. The welding procedures and the distance between the torches may weaken the weld properties.…”

Section: Hardness Distributionmentioning

confidence: 99%

Study on Medium-Thick Al-Alloy T-Joints by Dual P-GMAW Bilateral Synchronous Welding

Wang

Zhang

Yan

et al. 2021

Metals

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“…It also effectively expresses three critical parts of a stable hysteresis curve. The model has been widely applied for the fatigue characteristic of plastic deformation under large cyclic loading for different welded joints or components (Song et al, 2018a;Chatziioannou et al, 2019;Ji et al, 2019;Hanji et al, 2020;Hemmesi et al, 2020;Yonezawa et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Low-Cycle Fatigue Life Prediction of 10CrNi3MoV Steel and Undermatched Welds by Damage Mechanics Approach

Song

Liu

et al. 2021

Front. Mater.

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Welding of steel is a technique frequently used in practical engineering applications; however, their mechanical performance is strongly dependent on the physical metallurgical status of the weldments. In the present study, fully reversed, strain-controlled low-cycle fatigue (LCF) tests were conducted on 10CrNi3MoV steel and its undermatched weldments with strain amplitudes varying from Δε = ±0.5 to ±1.2%. Both base metal and weldments exhibited softening behavior at the beginning of the cyclic stage. Numerical investigations of cyclic stress–strain evolutions of the materials have been studied by the cyclic plastic model considering nonlinear hardening. The continuous damage mechanics (CDM) theory based on the experimental hysteresis stress–strain energy concept was employed to illustrate LCF failure, including damage initiation and deterioration. The damage mechanics approach calibrates the material parameters from the measured fatigue life for initiation and growth stages. Afterward, the combination of material cyclic plastic parameters and damage parameters was implemented to predict the LCF life. Good agreement can be observed between the experimental results and the FE results based on the CDM approach. Finally, the damage evolution of the materials under different strain amplitudes by this approach was assessed.

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“…Welding residual stresses promote the initiation and failure of fatigue cracks and even cause instability and fracture of components in complex service environments [ 8 , 9 , 10 , 11 ], which greatly affects the performance of components. Ferro et al [ 12 ] observed that the fatigue strength of welded joints is sensitive to the initial residual stresses caused by welding under high cyclic load.…”

Section: Introductionmentioning

confidence: 99%

Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy

Nie

Gong

et al. 2020

Materials

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Welding is one of the essential stages in the manufacturing process of mechanical structures. Friction stir welding structure of aluminum alloy has been used as a primary supporting member in aerospace equipment. However, friction stir welding inevitably generates residual stress that promotes the initiation and propagation of cracks, threatening the performance of the welded structure. Shot peening can effectively change the distribution of residual stress and improve the fatigue properties of materials. In this paper, friction stir welding and shot peening are performed on 2219 aluminum alloy plates. The residual stress fields induced by friction stir welding and shot peening are measured by using the X-ray diffraction method and incremental center hole drilling method, and the distribution characteristics of residual stress fields are analyzed. The effect of the pellet diameters and pellet materials used in shot peening on the redistribution of welding residual stress field are investigated. The pellet diameter used in the experiment is in the range of 0.6–1.2 mm, and the pellet material includes glass, steel, and corundum. This study provides guidance for the application of shot peening in friction stir welding structure of 2219 aluminum alloy.

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Numerical evaluation of surface welding residual stress behavior under multiaxial mechanical loading and experimental validations

Cited by 38 publications

References 23 publications

Study on Medium-Thick Al-Alloy T-Joints by Dual P-GMAW Bilateral Synchronous Welding

Study on Medium-Thick Al-Alloy T-Joints by Dual P-GMAW Bilateral Synchronous Welding

Low-Cycle Fatigue Life Prediction of 10CrNi3MoV Steel and Undermatched Welds by Damage Mechanics Approach

Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy

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