Prediction of keyhole TIG weld penetration based on high-dynamic range imaging

Zhang, Baori; Shi, Yonghua; Cui, Yanxin; Wang, Zishun; Hong, Xiaobin

doi:10.1016/j.jmapro.2020.03.053

Cited by 22 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the weld bead geometry, especially the weld depth of penetration, is shortened. Therefore, in such cases, the root of the welded joint can remain unwelded, leading to the low tensile strength and elongation of the welded joints [24].…”

Section: Optimizationmentioning

confidence: 99%

Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach

Karganroudi

Moradi

Attar

et al. 2021

Metals

View full text Add to dashboard Cite

This study involves the validating of thermal analysis during TIG Arc welding of 1.4418 steel using finite element analyses (FEA) with experimental approaches. 3D heat transfer simulation of 1.4418 stainless steel TIG arc welding is implemented using ABAQUS software (6.14, ABAQUS Inc., Johnston, RI, USA), based on non-uniform Goldak’s Gaussian heat flux distribution, using additional DFLUX subroutine written in the FORTRAN (Formula Translation). The influences of the arc current and welding speed on the heat flux density, weld bead geometry, and temperature distribution at the transverse direction are analyzed by response surface methodology (RSM). Validating numerical simulation with experimental dimensions of weld bead geometry consists of width and depth of penetration with an average of 10% deviation has been performed. Results reveal that the suggested numerical model would be appropriate for the TIG arc welding process. According to the results, as the welding speed increases, the residence time of arc shortens correspondingly, bead width and depth of penetration decrease subsequently, whilst simultaneously, the current has the reverse effect. Finally, multi-objective optimization of the process is applied by Derringer’s desirability technique to achieve the proper weld. The optimum condition is obtained with 2.7 mm/s scanning speed and 120 A current to achieve full penetration weld with minimum fusion zone (FZ) and heat-affected zone (HAZ) width.

show abstract

Section: Optimizationmentioning

confidence: 99%

Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach

Karganroudi

Moradi

Attar

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…A number of variants of the TIG welding process are available such as narrow gap, keyhole, active flux, and pulsed welding. 13,15,[17][18][19] In pulsed mode of TIG welding, the current oscillates between a maximum and minimum value resulting in a better utilization of arc energy. Pulsation of current also leads to grain refinement which significantly improves the weld joint strength.…”

Section: Introductionmentioning

confidence: 99%

Dissimilar tungsten inert gas welding between Inconel 718 and commercially pure titanium using a vanadium interlayer

Shehbaz

Junaid

Khan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

A weight reduction of aero engines, in order to enhance their efficiency would be possible if the commercially pure titanium in the low-temperature region of the compressor could be welded with Inconel in the high-temperature portion. This joining of titanium/Inconel is challenging owing to the formation of hard TixNiy intermetallic compounds, the suppression of which is not possible using the conventional weld process optimization approach. In recent years, a number of approaches have been developed to reduce or eliminate these intermetallic compounds during welding and one approach is the use of an interlayer during the welding operation. The insertion of a V interlayer at the root side remarkably suppressed Ti and Ni diffusion across the interlayer. NiV3 and (Ti, V) solid solutions were present in the interfacial microstructure of V/Inconel 718 and V/commercially pure titanium, respectively, as characterized by scanning electron microscope and X-ray diffraction. The tensile strength of the weldment was 190 MPa (approx. 59% of the commercially pure titanium base metal) with an elastic modulus comparable with that of the base alloys. The joint exhibited brittle fracture at the Inconel 718 side near the V/Inconel 718 interface due to intermetallic compounds.

show abstract

“…Bacioiu et al [12] adopted a neural network to learn the differences between good welds and defective welds and built the relationship between weld quality and morphological information of molten pool captured by HRD (high dynamic range) camera. Zhang et al [13] obtained the backside images of molten pool and keyhole by using pulse triggered imaging method in K-TIG (keyhole tungsten inert gas) welding, and established the prediction model of the relationship between molten pool and keyhole and weld penetration. Zhang et al [14,15] built a set of CCD (charge-coupled device) double-sensor visual detection systems.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Fusion Hole Perforation Based on Arc Characteristics of Front Image in Backing Welding

Cao

Wang

et al. 2020

Materials

View full text Add to dashboard Cite

In one-side welding with back-formation, the weld is penetrated after the fusion hole is perforated. Therefore, judging whether the fusion hole is perforated is very important to realize autocontrol of penetration in one-side welding with back-formation process. Previous researches mainly focused on the morphological characteristics of the molten pool and fusion hole to judge the weld penetration state. Sometimes it is difficult to obtain the morphological characteristics of the molten pool, keyhole and fusion hole and image processing is complex. In this paper, a visual detection system of fusion holes based on visual sensing is constructed to obtain the real-time fusion hole images in backing welding. It is found that the arc characteristics in the front images contain abundant information about the perforation of fusion hole. An image processing program is developed based on MATLAB software, and the arc characteristic parameters in front images are obtained. Taking the arc characteristic parameters as the input, obtaining the penalty function and the kernel function parameters through the cross validation and grid search method, a prediction model of fusion hole perforation based on the support vector machine is put forward. The accuracy for prediction samples is 88%. By analyzing the misidentified samples, it is found that some of the newly perforated images are predicted as nonperforated ones, which has little influence on the penetration control of the weld.

show abstract

Prediction of keyhole TIG weld penetration based on high-dynamic range imaging

Cited by 22 publications

References 25 publications

Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach

Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach

Dissimilar tungsten inert gas welding between Inconel 718 and commercially pure titanium using a vanadium interlayer

Prediction of Fusion Hole Perforation Based on Arc Characteristics of Front Image in Backing Welding

Contact Info

Product

Resources

About