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9. Welding Defects

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9. Welding Defects

9. Welding Defects 111 pletely fused. A false torch orientation may lead to lack of fusion between the layers, as shown in the lower figure.

http://mercury.kau.ac.kr/welding/Welding%20Technology%20II%20-%20Welding%20Metallurgy/Chapter%209%20-%20Welding%20Defects.pdf

Date added: February 20, 2012 - Views: 461

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NDT Images - Carestream Health, Inc.

ndt.carestream.com NDT Images AN OVERVIEW ... understand a wide variety of casting and welding defects that appear on images obtained during images will be compromised.

http://www.carestream.com/ndt-Image_Guide.pdf

Date added: October 2, 2012 - Views: 30

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Recognition of Welding Defects in Radiographic Images by ...

Res. J. Appl. Sci. Eng. Technol., 2(3): 295-301, 2010 297 (a) Slag inclusions (b) Porosity (c) Incomplete penetration Fig. 1: Image after preprocessing

http://www.maxwellsci.com/print/rjaset/v2-295-301.pdf

Date added: November 6, 2011 - Views: 47

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Detection of Welding Defects using S-TOFD and Digital Image ...

Detection of Welding Defects using S-TOFD and Digital Image Processing Techniques ... used the B-scan images of welded joints to detect the flaws present.

http://research.ijcaonline.org/volume48/number1/pxc3879909.pdf

Date added: May 3, 2013 - Views: 16

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Image Thresholding for Weld Defect Extraction in Industrial ...

Image Thresholding for Weld Defect Extraction in Industrial Radiographic Testing Nafaâ Nacereddine, Latifa Hamami, and Djemel Ziou Abstract—In non destructive ...

http://waset.org/publications/12939/image-thresholding-for-weld-defect-extractionin-industrial-radiographic-testing

Date added: January 10, 2014 - Views: 1

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Automatic Defect Detection and Counting In Radiographic ...

considering defects in weldment images as object of interest. To ... A Mahmoudi and al. A novel method for welding defects detection in radiographic images.

http://www.ijcaonline.org/volume10/number2/pxc3871971.pdf

Date added: May 23, 2013 - Views: 2

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CLASSIFICATION OF WELDING DEFECTS IN RADIOGRAPHS USING ...

Wang, G, Liao, T. W. Automatic Identification of Different Types of Welding Defects in Radiographic Images. NDT&E International 2002; 35: 519-528. 5. R. R.

http://www.ndt.net/article/wcndt2004/pdf/radiography/715_padua.pdf

Date added: December 30, 2011 - Views: 22

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Segmentation of welding defects using - :: www.viZZion.cl ::

Segmentation of welding defects using a robust algorithm Miguel Carrasco1 and Domingo Mery2* 1 Departamento de Ingeniería Informática Universidad de Santiago de Chile

http://www.vizzion.cl/files/CarrascoMery_MEVAL.pdf

Date added: April 2, 2012 - Views: 14

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Shielding gas. Gases for all types of stainless steel.

used for TIG welding stainless steel than for steel, but not all ... the scrapping or repairing of welding defects can be a significant cost and must be avoided.

http://www.linde-gas.com/internet.global.lindegas.global/en/images/Shielding_gases_for_stainless_steel_60785_1217_82204.pdf

Date added: May 11, 2013 - Views: 4

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A METHOD FOR DETECTION WELDING DEFECTS IN RADIOGRAPHIC IMAGES

Alireza Azari Moghaddam, Lalitha Rangarajan 308 Bioinfo Publications Our method From the observation of the horizontal line profiles of weld images without defects ...

http://eprints.uni-mysore.ac.in/15420/1/13258330823_4_24_IJMI.pdf

Date added: May 16, 2014 - Views: 1

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Contour Estimation in Synthetic and Real Weld Defect Images ...

Abstract—This paper describes a novel method for automatic estimation of the contours of weld defect in radiography images. Generally, the contour detection is the ...

http://waset.org/publications/12045/contour-estimation-in-synthetic-and-real-weld-defect-images-based-on-maximum-likelihood

Date added: December 11, 2013 - Views: 1

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Detection of Weld Line Defect for Oil-gas Pipeline Based on X ...

Abstract—The optimal threshold method is used for the x-ray welding image ... But the images of x-ray ... The discussions about identifying defects in images ...

http://www.academypublisher.com/proc/wisa09/papers/wisa09p273.pdf

Date added: May 8, 2012 - Views: 8

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A Review on Inspection of welding defects using Segmentation ...

images, non-uniformed ... There are many different welding methods that depend on the ... A Review on Inspection of welding defects using Segmentation Techniques

http://www.ijser.org/researchpaper/A-Review-on-Inspection-of-welding-defects-using-Segmentation-Techniques.pdf

Date added: March 8, 2014 - Views: 1

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Volume 1, Issue 6, June 2012 An Innovative Method for Defect ...

describe an automatic detection system to recognize welding defects in radiographic images. In a first stage, image processing techniques, ...

http://www.ijeit.com/vol%201/Issue%206/IJEIT1412201206_35.pdf

Date added: August 3, 2013 - Views: 3

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Slag Inclusion Defects In Film Image Radiographic

Automatic identification of different types of welding defects in radiographic images ... API 1104 Practice Examination - American Welding Society.

http://www.pdfsdocuments.com/slag-inclusion-defects-in-film-image-radiographic.pdf

Date added: November 8, 2014 - Views: 1

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Avoiding Defects in Stainless Steel Welds

Discontinuities and Defects Welding on stainless steels can produce the typical weld discontinuities or defects, ... Avoiding Defects in Stainless Steel Welds

http://files.aws.org/wj/2007/05/wj200705/wj0507-56.pdf

Date added: February 9, 2012 - Views: 242

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CLASSIFICATION OF WELDING DEFECTS IN RADIOGRAPHS USING ...

CLASSIFICATION OF WELDING DEFECTS IN RADIOGRAPHS USING TRAVERSAL ... have the digital radiography available to have these images. The welding seam extraction require ...

http://www.romeu.eng.br/WCNDT2004_Germano_final.pdf

Date added: July 24, 2013 - Views: 2

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New Jersey Section News - American Welding Society - Section

New Jersey Section News April, 2014 Newsletter Information New Jersey Section News is the official publication of the ... “Flux Core Arc Welding Defects & Causes ...

http://sections.aws.org/newjersey/images/AWSNJApril2014.pdf

Date added: April 25, 2014 - Views: 2

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Weld assessments and weld properties - :: สำนัก ...

Weld assessments •Weldments normally contain defects. However we need to keep weld defects at a minimum level to maintain reliable products. Pressure vessel weld ...

http://eng.sut.ac.th/metal/images/stories/pdf/07_%20Weld%20porperties%20and%20assessment.pdf

Date added: November 6, 2012 - Views: 13

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Statistical Fluctuation and Fractal Analyses of Weld Defect ...

Statistical Fluctuation and Fractal Analyses of Weld ... of D-scan images for the classification of welding defects. The images were obtained in welding ...

http://www.ndt.net/article/wcndt2012/papers/123_wcndtfinal00123.pdf

Date added: October 15, 2012 - Views: 2

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Application of frequency domain processing to X-ray ...

148 M.I. Rajab et al. / Application of frequency domain processing to X-ray radiographic images of welding defects Frequency Domain Processing

http://www.researchgate.net/profile/Talaat_El-Benawy/publication/228879619_Application_of_frequency_domain_processing_to_X-ray_radiographic_images_of_welding_defects/links/0deec51a73628a4f1c000000

Date added: October 21, 2014 - Views: 1

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Defects detection in X-ray images and photos - ResearchGate

Defects detection in X-ray images and photos ROUMEN KOUNTCHEV Department of Radio Communications Technical University of Sofia Bul. Kl. Ohridsky 8, Sofia 1000

http://www.researchgate.net/profile/Roumen_Kountchev/publication/228638382_Defects_detection_in_X-ray_images_and_photos/links/09e41510bfcc86b049000000

Date added: October 12, 2014 - Views: 1

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www.iosrjen.org A Novel Approach for Automatic Detection of ...

Researchers have done extensive work on welding defects evaluation ... “Hierarchical Segmentation Approach to Detection of Defects on Welding Radiographic Images”,

http://www.iosrjen.org/Papers/vol2_issue6%20(part-2)/A0260105.pdf

Date added: March 15, 2013 - Views: 1

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Common HF Welding Defects - Tube & pipe welding equipment ...

Common HF Weld Defects There are many types and variations of HF welding defects and each one is known by many different names around the industry.

http://www.thermatool.com/information/papers/quality/COMMON-HF-WELDING-DEFECTS.pdf

Date added: December 11, 2011 - Views: 162

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Quality Level Assessment for Imperfections in GMAW

welding defects in radiographic images ... (BPN) classifier is dis-cussed in the eighth section, and the re-sults are discussed in the ninth section. Fi-

http://www.aws.org/wj/supplement/WJ_2014_03_s85.pdf

Date added: March 20, 2014 - Views: 2

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The ABC's of Arc Welding and Inspection

The ABC’s of Arc Welding and Inspection is to provide ... welding defects which can occur, if welding procedures are not appropriate. Table 4.4 shows

http://www.kobelco-welding.jp/images/education-center/pdf/ABC_4Ed.pdf

Date added: March 20, 2014 - Views: 1

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Lecture 6 Weldability and defects in weldments

Weldability and defects in weldments Subjects of Interest •Reviews of weld design and weldability •Residual stresses and weld distortion •Weld metal inhomogeneities

http://eng.sut.ac.th/metal/images/stories/pdf/06_%20Weldability%20and%20defects%20in%20weldments.pdf

Date added: May 18, 2012 - Views: 135

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APPLICATION OF ARTIFICIAL NEURAL NETWORKS TO EVALUATE WELD ...

defects, it is unsuccessful in identifying some welding defects because of the nature of ... images is LVQ and RB neural networks. RADIAL BASIS NETWORK

http://www.physicsegypt.org/jnrp/v3n202.pdf

Date added: March 17, 2012 - Views: 60

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Butt welds - Size

Root Welding Defects. Root L.O.F Causes Too small a root gap Arc too long Wrong polarity Electrode too large for joint preparation Incorrect electrode angle

http://petropipe.epage.ir/images/petropipe/content/%D8%AC%D9%88%D8%B4/Weld%20Defect.pdf

Date added: March 9, 2014 - Views: 7

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TECHNICAL REPORT

selected joining methods one chapter addressing welding defects in general, and some relevant ... Images used are DNV property unless otherwise indicated.

http://www.ptil.no/getfile.php/z%20Konvertert/Helse%2C%20milj%C3%B8%20og%20sikkerhet/Hms-Aktuelt/Dokumenter/dnvrapport2.pdf

Date added: January 31, 2012 - Views: 31

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Automatic detection of welding defects using texture features

detection of defects in X-ray images. The method generates a binary ... Figure 1. Detection of welding defects using a pattern recognition schema

http://web.ing.puc.cl/~dmery/Prints/ISI-Journals/2003-Insight-b.pdf

Date added: May 11, 2013 - Views: 4

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Crack Defects Detection in Radiographic Weldment Images using ...

Crack Defects Detection in Radiographic Weldment Images using FSVM and Beamlet Transform Zheng Sun1, Dianxu Ruan1, Yun Ma1, Xiaolei Hu1, Xiao-guang Zhang1,2

http://doi.ieeecomputersociety.org/10.1109/FSKD.2009.35

Date added: December 22, 2014 - Views: 1

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Weld Imperfections and Preventive Measures - KOBELCO 神戸製鋼

in order to help the learners fully understand specific technologies of arc welding and related weld imperfections.

http://www.kobelco.co.jp/english/welding/events/files/2011Defect.pdf

Date added: May 27, 2012 - Views: 7

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Welding Defect Detection and Classification Using Geometric ...

field to realize an automated system looking for defects through radiographic images. As conventional image ... and location of welding defects, distance from centre,

http://www.computer.org/csdl/proceedings/fit/2012/4946/00/4927a139.pdf

Date added: December 22, 2014 - Views: 1

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Development of An Automated Inspection System for Welding ...

258 weld radiographic images are examined. ... with the inclusion of potential welding defects. 1. Introduction Welding is one of the major joining processes.

http://eprints.usm.my/14796/1/paper3.pdf

Date added: February 20, 2012 - Views: 18

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Evaluation of the Relevant Features of Welding Defects in ...

428 Carvalho et al. Materials Research 2. Detection and Classification of Welding Defects on Radiographic Images The radiographic image processing is especially used

http://www.scielo.br/pdf/mr/v6n3/a19v6n2.pdf

Date added: March 21, 2012 - Views: 9

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Radiographics pattern recognition of welding defects using ...

Radiographics pattern recognition of welding defects using linear classifiers R R da Silva, ... (there are also equipments that generate digital images directly

http://www02.lps.ufrj.br/~caloba/Papers%20meus/welding%20radiographics%20-%20patterns%20recognition.pdf

Date added: May 21, 2012 - Views: 12

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PM10680 Characterization of Welding Defects by Digital Image ...

weld joint through these digital images was also made, looking for parameters inherent to the de-fect image which could lead to its characteriza-

http://www.romeu.eng.br/paper_Final_Practical.pdf

Date added: November 26, 2013 - Views: 1

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The Mechanisms of Formation of Weld Defects in High-Frequency ...

The Mechanisms of Formation of Weld Defects in High-Frequency Electric Resistance Welding The two kinds of defects associated with previously defined welding

http://www.aws.org/wj/supplement/WJ_1981_06_s104.pdf

Date added: July 3, 2013 - Views: 4

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WELDING DEFECTS Welding defects, causes and correction

26 Australian Bulk Handling Review: July/August 2009 WELDING DEFECTS Welding defects can greatly affect weld performance and longevity. Having an understanding of the

http://www.bulkhandling.com.au/pdfs/26-28.pdf

Date added: February 20, 2012 - Views: 790

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WELDING DEFECT PATTERN RECOGNITION IN RADIOGRAPHIC IMAGES OF ...

1 23 rd World Gas Conference, Amsterdam 2006 WELDING DEFECT PATTERN RECOGNITION IN RADIOGRAPHIC IMAGES OF GAS PIPELINES USING ADAPTIVE FEATURE

http://members.igu.org/html/wgc2006/pdf/paper/add10316.pdf

Date added: October 12, 2014 - Views: 1

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Automated Detection of Welding Defects without Segmentation

Automated Detection of Welding Defects without Segmentation Domingo Mery Pontificia Universidad Catolica de Chile Av. Vicuna Mackenna 4860(143), Santiago de Chile

http://web.ing.puc.cl/~dmery/Prints/ISI-Journals/2011-MatEval-Welding.pdf

Date added: May 23, 2013 - Views: 2

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Overview of Shielding Gases - Linde Gas

these welds can suffer from greater numbers of fusion defects than ... There are many ways in which a shielding gas can improve welding process performance.

http://www.linde-gas.com/internet.global.lindegas.global/en/images/Overview_of_shielding_gases_60734_1217_82202.pdf

Date added: May 7, 2013 - Views: 1

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Investigation of High-Power Fiber Laser Welding Phenomena of ...

Investigation of High-Power Fiber Laser Welding Phenomena of Stainless Steel to form a convex surface, and the melt sometimes resulted in spatters.

http://www.jwri.osaka-u.ac.jp/publication/trans-jwri/pdf/362-03.pdf

Date added: May 4, 2012 - Views: 4

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to the Typical Defects of Crystalline Photovoltaic Cells ...

Research to the Typical Defects of Crystalline Silicon Photovoltaic Cells based on EL Images Wang ... over welding, etc. Research the Typical Images of Defects

http://www.ijesci.org/Download.aspx?ID=7791

Date added: June 26, 2013 - Views: 1

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New Jersey Section News November, 2012 - American Welding ...

Welding Defects Speaker: Robert F. Waite, PE, CWI The presentation will cover weld inspection re-quirements under the International Building Code (IBC ...

http://sections.aws.org/newjersey/images/AWSwebNovember2012.pdf

Date added: December 22, 2012 - Views: 3

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Extremum Search Based Welding Defect Inspecting Algorithm of ...

It is used to locate the welding line position and the defects. Firstly, the amorphous silicon detector based system acquires original digital images.

http://www.sensorsportal.com/HTML/DIGEST/september_2014/Vol_178/P_2385.pdf

Date added: December 22, 2014 - Views: 1

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Study and characterization of welding defects during ...

Study and characterization of welding defects during ... 1008 carbon steel vessels through the submerged arc welding ... SEM images showing (a) ...

http://www.menawelding.org/wp-content/uploads/2013/05/1008-steel-defects.pdf

Date added: July 24, 2013 - Views: 10

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Automated Weld Defects Detection Using Image Processing and ...

controlling different welding defects. ... analyses the captured images of a CCD camera and extracts the parameters of the weld such as size, position, surface

http://pooya.um.ac.ir/ResearchDocuments/papers/1008883.pdf

Date added: June 8, 2013 - Views: 1