Real Time Non-Destructive Testing Methods of Welding

Kah, Paul; Mvola, Belinga; Martikainen, Jukka; Suoranta, Raimo

doi:10.4028/www.scientific.net/amr.933.109

Cited by 20 publications

(26 citation statements)

References 5 publications

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“…Obviously, such method is destructive and time consuming and so it is not suitable for industrial mass production. Non-destructive alternatives also include post mortem analysis using active methods and the main ones are: X-ray tomography [9], ultrasonic testing and magnetic induced analysis (MIA) [10]. The use of X-ray tomography is strongly limited due to the large scale and expensive installations.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the computational complexity of the data processing is not adapted yet to operate in realtime. Ultrasonic testing is an active method, which detects the response of a workpiece to the injected ultrasonic waves [10]. The drawback of this method is in the spatial resolution which is dependent on the wavelength, thus missing defects below a certain size.…”

Section: Introductionmentioning

confidence: 99%

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Laser Welding Quality Monitoring via Graph Support Vector Machine With Data Adaptive Kernel

et al. 2019

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Laser welding is a rapidly developing technology that is of utmost importance in a number of industrial processes. The physics of the process has been investigated over the past 50 years and is mostly well understood. Nevertheless, online laser-quality monitoring remains an open issue until today due to its dynamic complexity. This paper is a supplement to existing approaches in the field of in situ and real-time laser-quality monitoring that presents a novel combination of state-of-the-art sensors and machine learning for data processing. The investigations were carried out using laser welding of titanium workpieces. The quality was estimated a posteriori by the visual inspection of cross-sections of the welded joints. Four quality categories were defined to cover the two main laser welding regimes: conduction and keyhole. The signals from the laser back reflection and optical and acoustic emissions were recorded during the laser welding process and were decomposed with the M-band wavelets. The relative energies of narrow frequency bands were taken as descriptive features. The correlation of the extracted features with the laser welding quality was carried out using the Laplacian graph support vector machine classifier. Also, an adaptive kernel for the classifier was developed to improve the analysis of the distributions of the complex features and was constructed from Gaussian mixtures. The presented laser welding setup and the developed adaptive kernel algorithm were able to classify the quality for every 2 µm of the welded joint with an accuracy ranged between 85.9% and 99.9%. Finally, the results of the developed adaptive kernel were compared with stateof-the-art machine learning methods.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser Welding Quality Monitoring via Graph Support Vector Machine With Data Adaptive Kernel

et al. 2019

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“…While trying to satisfy the need, relationship between's Destructive Test (DT) and Non-dangerous Test were done". "Reference [13] displayed the physical foundation of activity for radiography vortex present and ultrasonic assessment and examined their advantages, restrictions and run of the mill zones of uses". "Reference [14] exhibited a review on the guideline of activity for post-process assessment non-damaging testing methods".…”

Section: Revised Manuscript Received On December 5 2019mentioning

confidence: 99%

An Examination on Queuing Classification in Non-Destructive Testing

Radha¹,

Sundari²,

Eswar³

et al. 2019

IJEAT

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Nondestructive testing (NDT) is the way toward assessing, testing, or assessing materials, segments or gatherings for discontinuities, or contrasts in attributes without pulverizing the usefulness of the part or framework. Today current nondestructive tests are utilized in assembling, creation and in-administration investigations to guarantee item uprightness and unwavering quality, to control fabricating forms, lower generation costs and to keep up a uniform quality dimension. Amid development, NDT is utilized to guarantee the nature of materials and joining forms amid the manufacture and erection stages, and in-administration. NDT assessments are utilized to guarantee that the items being used keep on having the honesty important to guarantee their value and the security of the general population .Test strategy names regularly allude to the kind of entering medium or the hardware used to play out that test. One of the every now and again utilized test techniques is Liquid infiltrating test. The procedure is carried out in such a way that, to begin with, the penetrant is connected on the specimen which is to be tried, next the utilization of developer is done. In any case, before this designer procedure, there is a delay where other distractive procedure to be discounted. Next after the developer procedure, the procedure is rehashed if the aftereffect of the item isn't true to form. Following, maintenance work, for example, pre cleaning process like showering, brushing, inundating and so on is done. At last if in need another primer nondestructive test is additionally done for the item got. The above procedure is totally changed into a Queuing procedure in which the issue is all around concentrated by hypothesis of lining and it is illuminated by beneficial variable strategy. By the utilization of the above strategy, all the presentation proportions of the line in this procedure can be determined. Numerical delineation and graphical portrayal still amplify the model to a great extent.

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“…Nowadays the non-destructive examination is used to verify the integrity of the products starting from the early stages of the manufacturing processes to the last stages of the product exploitation process. So, to know which method to use for each type of material it is essential to reduce the non-destructive testing related costs [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Chemical composition based on high Cr, Ni and Mo content, improves resistance to intergranular and pitting corrosion. As a result of the development of offshore oil and gas exploitations, the next generation of duplex steels was developed by the deliberate addition of nitrogen as an alloying element, which improves both the tenacity of the thermally influenced area of the joint and the corrosion resistance in ion-containing environments of chlorine [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive Testing of Duplex Welding Joints

GHEȚA¹,

Dijmărescu²,

BICHIR³

et al. 2018

MMS

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This paper presents results of non-destructive examination of welding belt and the heat affected zone. The samples were made using sheets of duplex stainless steel, welded through the method of manual welding with coated electrode, by utilizing 4 types of electrodes. The specimens were subjected to different nondestructive examination methods in order to identify the defects, to establish new efficient procedures and to achieve high productivity in detection of defects appeared.

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Real Time Non-Destructive Testing Methods of Welding

Cited by 20 publications

References 5 publications

Laser Welding Quality Monitoring via Graph Support Vector Machine With Data Adaptive Kernel

Laser Welding Quality Monitoring via Graph Support Vector Machine With Data Adaptive Kernel

An Examination on Queuing Classification in Non-Destructive Testing

Non-destructive Testing of Duplex Welding Joints

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