On-line monitor of hydrogen porosity based on arc spectral information in Al–Mg alloy pulsed gas tungsten arc welding

Yu, Huanwei; Xu, Yanling; Song, Jinquan; Pu, Jianzhong; Zhao, Xianxian; Guo-ping, Yao

doi:10.1016/j.optlastec.2015.01.010

Cited by 40 publications

(17 citation statements)

References 26 publications

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“…The summary of the porosity analysis of the samples using the CT method is shown in table 5. Preliminary observation from both CT image and residual stress results suggested that the area with high porosity was likely to create tensile residual stress on the surface [8], which could decrease the surface integrity and strength of the material. Top and side view crosssection of 2024 aluminium alloy as shown in figures 7, 8.…”

Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

“…This is usually done offline. Nevertheless, the x-ray technique cannot separate the overlapping porosities in the thickness direction [8]. After welding, the pores are frequently inspected by x-ray.…”

Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

“…Sample number 7 was chosen to measure the threedimensional pores to achieve more precision using 3D x-ray CT. X-ray CT with cone-beam geometry has been used for non-destructive characterization and evaluation of materials [37]. X-ray transmission investigated the specimen using the same type of x-ray tube as in the micro-focused x-ray transmission imaging system [8].…”

Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

“…One of the major problems associated with the welding of aluminium alloys is the formation of gas porosity [8]. Porosity is an important factor responsible for the degradation of mechanical properties.…”

Section: Introductionsmentioning

confidence: 99%

“…The solubility of hydrogen in the molten aluminum is about 20 times higher than that in the solid aluminum. Thus, once hydrogen has been introduced into the weld pool in welding, weld porosities would form while the weld pool containing dissolved gases above the solubility limit in solid aluminium [8].…”

Section: Introductionsmentioning

confidence: 99%

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Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Poolperm

Nakkiew

Naksuk

2020

Mater. Res. Express

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Simulations of the welding process for butt joints using finite element analysis (FEA) of the effect of porosity are presented. The metal used was aluminium alloy (grade 2024), and the filler material was alloy ER5356. The simulations were performed using the commercial software ANSYS, considering a double ellipsoid heat source, temperature-dependent material properties, material deposits, mechanical analysis, transient heat transfer, and defects (porosity). In this study, the FEA simulations were constructed for two types of heat source (singleand double-ellipsoid) used in gas tungsten arc welding (GTAW), and the calculated residual stress results were compared with the experimental values. Two double ellipsoid models were constructed for cases with and without porosity. The porosity was measured by three-dimensional (3D) computed tomography (CT), and the size and location of pores were mapped onto the weld bead created by the birth-and-death technique.

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Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

Section: X-ray Computed Tomography (Ct)mentioning

confidence: 99%

Section: Introductionsmentioning

confidence: 99%

Section: Introductionsmentioning

confidence: 99%

See 3 more Smart Citations

Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Poolperm

Nakkiew

Naksuk

2020

Mater. Res. Express

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Effect of Ultrasonic‐Assisted Treatment on Microstructure and Mechanical Properties of Laser Deposition Repairing AlSi7Mg Alloy

Yi,

Sun,

Cui

et al. 2024

Adv Eng Mater

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The study focusing on the repairing technology with highly efficient and high quality for aerospace aluminum alloy parts is of great necessity and application significance. Herein, laser deposition repairing (LDR) technology with and without ultrasonic‐assisted treatment is employed to repair the AlSi7Mg alloy. The morphological analysis results show that ultrasonic‐assisted treatment laser deposition repairing (UT‐LDR) can significantly refine the grain, reduce the porosity, and provide dislocation strengthening of repaired zone (RZ). The microhardness of RZ is higher than that of the base material due to the strengthening effect of fine grain. The microhardness of RZ further increases by 27.7% under the action of ultrasound. With the introduction of ultrasound, tensile strength of repaired samples increases from 180.9 to 241.7 MPa, but the elongation decreases from 4.0% to 1.8%. Both LDR and UT‐LDR samples show brittle fracture mechanism with tiny dimples and obvious cleavage planes.

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Defects Comparison Between Single- and Double-Sided Electron Beam Welded Dissimilar DP600 Steel to 5754 Al Alloy Joints: X-Ray Tomography Study

Dinda

Srirangam

Roy

2020

The Minerals, Metals &Amp; Materials Series

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On-line monitor of hydrogen porosity based on arc spectral information in Al–Mg alloy pulsed gas tungsten arc welding

Cited by 40 publications

References 26 publications

Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Effect of Ultrasonic‐Assisted Treatment on Microstructure and Mechanical Properties of Laser Deposition Repairing AlSi7Mg Alloy

Defects Comparison Between Single- and Double-Sided Electron Beam Welded Dissimilar DP600 Steel to 5754 Al Alloy Joints: X-Ray Tomography Study

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