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Minimizing Defects in Submerged Arc Welding

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Minimizing Defects in Submerged Arc Welding

fully dealing with submerged arc welding defects. Fig. 2 — Porosity is most commonly caused by the presence of moisture in the weld. Fig. 3 — Undercut generally occurs when the amount of wire deposited is not great enough to fill the gaps in the material

http://files.aws.org/wj/2009/09/wj200909/wj0909-78.pdf

Date added: February 20, 2012 - Views: 65

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Welding Defects, Causes & Correction - ASPEC Engineering

Welding defects can greatly affect weld performance and longevity. Having an understanding of the various defects, their causes and remedies can help to ensure higher-quality and ... Porosity is a collective name describing cavities or pores

http://www.aspec.com.au/uploads/1/6/3/0/16304516/welding_defects_causes__correction.pdf

Date added: May 9, 2013 - Views: 40

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Formation and Distribution of Porosity in Al-Si Welds

Nevertheless, welding can generate defects, such as porosity or hot cracking, which could limit its development. ... welding, porosity content could be decreased by the addition of SiCl4 in shielding gas. Laser Hybrid welding process

http://www.wpi.edu/Pubs/ETD/Available/etd-050806-132406/unrestricted/Legait.pdf

Date added: December 28, 2011 - Views: 13

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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, including the following: † Cracks ... • Porosity • Weld spatter • Arc strikes • Rough weld ripples Fig. 9 — Irregular weld penetration in

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

Date added: February 9, 2012 - Views: 242

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9. Welding Defects

9. Welding Defects 109 A distinction of arising defects by their origin is shown in Figure 9.5. The development of the most important welding defects is explained in the following paragraphs.

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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Weld Defects and How to Avoid Them - Welders Universe

Weld Defects and How to Avoid Them Needless to say, such grisly possibilities keep ... used in most welding processes. Porosity is usually caused by one of the following: • The flow meter setting on the shielding gas tank is too high.

http://www.weldersuniverse.com/weld_defects.pdf

Date added: March 12, 2013 - Views: 23

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Common HF Welding Defects - Thermatool

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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Effects of Porosity on High Strength Aluminum 7039

aluminum welding is porosity. Engi­ neering evaluation of porosity in weld joints has been a serious prob­ lem since the beginning of aluminum fusion welding technology. Weld defects such as porosity have grown more and more important as

http://www.aws.org/wj/supplement/WJ_1970_07_s311.pdf

Date added: June 24, 2013 - Views: 6

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DEFECTS IN WELDING - HCMUT - Project Management System

DEFECTS IN WELDING cont. Porosity: Definition: A hole or cavity found internally or externally in the weld. Porosity can originate from wet electrodes, electrode flux

http://www4.hcmut.edu.vn/~dantn/course/Pdf/defects-Ed.pdf

Date added: August 25, 2013 - Views: 5

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WELDING DEFECTS

WELDING DEFECTS LACK OF FUSION Lack of fusion, also called cold lapping or cold shuts, occurs when there is no fusion between the weld metal and

http://xa.yimg.com/kq/groups/22687970/1840133808/name/Welding+Defect.pdf

Date added: November 27, 2013 - Views: 4

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Chapter Weld Inspection and Repair - G-W

ness, welding process, and inspection criteria being used. Where tests are required out-of-perpendicular ... Porosity, wormhole Figure 18-32. The defects shown can occur in the interior of the weld. This sample chapter is for review purposes only.

http://www.g-w.com/pdf/sampchap/9781605257938_ch18.pdf

Date added: February 27, 2013 - Views: 20

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Common Weld Defects - Causes and Cures - Qualimet

Porosity cannot be repaired by welding overtop of the problem. Grind out to remove the porosity, then re-weld. Other Weld Defects Other defects include cracks, craters, inclusions, and physical damage (arc strikes, slag inclusions, and

http://www.qualimet.ca/pdfs/Common%20Weld%20Defects%20-%20Causes%20and%20Cures.pdf

Date added: January 16, 2014 - Views: 3

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Effects of Porosity on Mechanical Properties of Aluminum Welds

Effects of Porosity on Mechanical Properties of Aluminum Welds increasing area fractions of porosify in a weld cross section reduces strength, and fine porosity—when present in sufficient

http://www.aws.org/wj/supplement/WJ_1970_07_s322.pdf

Date added: June 24, 2013 - Views: 3

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PULSED LASER WELDING - Welding Consultant and Welding ...

vs. keyhole), residual stress, and related defects such as porosity and cracks. KEYWORDS: Pulsed Laser Welding, coupling, fusion, cooling rate, residual stress, cracks ... Laser welding is a non-contact autogenous welding process that is an excellent choice for

http://www.welding-consultant.com/PulsedLaserWelding.pdf

Date added: December 21, 2011 - Views: 24

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WELDING DEFECTS Welding defects, causes and correction

WELDING DEFECTS Welding defects can greatly affect weld performance and longevity. ... unstable arc, arc gap too short and poor welding technique in general. Porosity can be minimized in many different ways – by the proper selection of electrodes and/or filler materials, improved

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

Date added: February 20, 2012 - Views: 790

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Structural Steel Welding - Schnitzhofer & Associates, LLC

Most welds contain defects (porosity, cracks, slag inclusions, etc.). The question is to determine if they are significant ... welding structural steels. Information about shielding gases is given along with the explanation of

http://www.schnitzhoferandassoc.com/wp-content/uploads/2011/03/Structural-Steel-Welds.pdf

Date added: December 20, 2011 - Views: 246

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Structural Steel Welding - University of South Carolina

Structural Steel Welding Semih Genculu, P.E. 2007 PDH Center 2410 Dakota Lakes Drive Herndon, VA 20171-2995 Phone: 703-478-6833 Fax: 703-481-9535 www.PDHcenter.com. ... Most welds contain defects (porosity, cracks, slag inclusions, etc.).

http://www.ce.sc.edu/deptinfo/members/faculty/ray/web1/Ugrad/ECIV%20303/WeldingFab/s150content.pdf

Date added: December 17, 2011 - Views: 108

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What can I do to prevent porosity occurring when welding ...

Air Products shares their philosophy on welding aluminium – how to avoid porosity, the importance of preparation and the benefits of using the right gas mix.

http://www.airproducts.com/~/media/Files/PDF/industries/metals-fabrication-welding-aluminium.pdf

Date added: November 20, 2012 - Views: 2

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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 ... www.mig-welding.co.uk Porosity observed in aluminium welded specimen after fractured. Porosity Cracks Tapany Udomphol. Weldability

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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New Welding Process, J-SolutionTM Galvanized Steel in the ...

In the automotive industry, galvanized steel sheets have been applied for quality improvement. However, the porosity defects generated during welding and increased

http://www.kobelco.co.jp/english/ktr/pdf/ktr_32/016-023.pdf

Date added: January 19, 2014 - Views: 2

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Welding Discontinuities Cause & Prevention

Welding Discontinuities Cause & Prevention Porosity – Cavity- type discontinuity formed by gas entrapment during solidification Incomplete Joint Penetration – A joint root

http://awo.aws.org/wp-content/uploads/2014/aluminumconference/06AluminumWeldDiscontinuitiesCausesCures_TonyAnderson.pdf

Date added: September 25, 2014 - Views: 1

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Defects/Repairs

Herringbone porosity Arc length too large Damaged electrode flux Moisture on parent material Welding current too low. Gas Cavities ... Parent Material Defects A welding inspector should also inspect the parent material for any visible defects Mechanical damage Lap

http://azizieh.persiangig.com/document/Welding%20Defects.pdf

Date added: July 8, 2012 - Views: 35

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Welding problems and defects – causes and remedies

Porosity Welding problems and defects – causes and remedies www.esab.com XA00152120 1039136_Welding faults_Engels.indd 1 16-02-11 14:34. Title: 1039136_Welding faults_Engels.indd Created Date:

http://www.esab.com/gb/en/support/upload/XA00152120-Welding-defects-february-2011.pdf

Date added: December 6, 2012 - Views: 19

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The ultrasonic wave interaction with porosity defects in ...

The ultrasonic wave interaction with porosity defects in welded rail head ... Although the aluminothermic welding technique is well proven, it is a critical safety component of the rail infrastructure. The consequences of a single failure could result in the derailment.

http://www.railect.com/publication/files/Vol_65_No_1_2010_02_Jasiuniene.pdf

Date added: October 18, 2012 - Views: 2

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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 gas mixtures are suitable for all material types, ... By making it easier for the welder to use, it reduces the risk of welding defects such as porosity and fusion problems. With high value raw

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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Field Welding Inspection Guide - Pages - Welcome to The Ohio ...

Field Welding Inspection Guide Assistance in interpretation of any specification or questions concerning field welding issues can be obtained from the Office of Materials Management, Structural Welding and

http://www.dot.state.oh.us/Divisions/ConstructionMgt/Materials/Miscellaneous/Field-Welding-Inspection-Guide.pdf

Date added: October 21, 2011 - Views: 345

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TESTING AND INSPECTION OF - Gaziantep Üniversitesi

they quite often reveal the presence of defects ... expensive inspection method. The welding inspector can utilize inspection visual ... creater cracks, surface porosity, incomplete root penetration, undercut, underfill), warpage, base metal

http://www1.gantep.edu.tr/~oyilmaz/Lecture%20Notes/ME%20473/Testing%20and%20Inspection%20of%20welds.pdf

Date added: September 27, 2012 - Views: 52

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Weld Defects - PersianGIG

Weld Defects. Lack of Side Wall Fusion. Lack of Inter Run Fusion. Porosity. Slag Inclusions. Incomplete Root Fusion /Penetration. Solidification Cracking. Overlap. Excess Weld Metal. Excess Penetration. Root Concavity. Slag Inclusion. Surface Breaking Porosity.

http://irwelding.persiangig.com/document/oube%20joosh/weld%20defects.pdf

Date added: June 11, 2012 - Views: 29

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Weld Defects-Their Causes and How to Correct Them

welding process, weld defects can occur. Most defects encountered in welding are due to an improper welding procedure. Once the causes are determined, ... Porosity is gas pores found in the solidified weld bead. As seen in Figure 10-4, these

http://xa.yimg.com/kq/groups/22687970/1987275152/name/Welding+defects.pdf

Date added: May 23, 2014 - Views: 1

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MSi Investigative Summary - MSi Testing & Engineering

To alleviate excessive root penetration, root concavity and welding technique-related porosity defects in the weld joints, we respectfully recommend reviewing and adjusting the current welding procedures. Destructive

http://www.msitesting.com/docs/Weld-testing-defect-analysis-of-circumferential-groove-weld.pdf

Date added: April 26, 2014 - Views: 1

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FLAWS IN FRICTION STIR WELDS A J Leonard and S A Lockyer TWI ...

4th International Symposium on Friction Stir Welding, Park City, Utah, USA, 14-16 May 2003 ... porosity and hot cracking encountered in fusion welds. In addition, ... have been reported with regard to the occurrence of defects. However, it is inevitable that, as

http://research.vuse.vanderbilt.edu/vuwal/Paul/Paper/References/S02%20-%20P1%20-%20Leonard,%20Lockyer.pdf

Date added: May 2, 2012 - Views: 21

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Porosity in Thermite Welds - publish.illinois.edu | A blog ...

What is Thermite Welding? ... – Pores are much more serious defects. 6 Porosity and fatigue strength. 7 Source of porosity in thermite welds • Dissolved gases in molten metal. ... Porosity cluster is often observed along centerline of weld. 5.

http://publish.illinois.edu/fracturegroup/files/2014/07/Chen-presentation.pdf

Date added: August 11, 2014 - Views: 1

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Finite element modeling of the aluminothermic welding with ...

Finite element modeling of the aluminothermic welding with internal defects and experimental analysis I. Mouallif1, Z. Mouallif 2, A. Benali1, and F. Sidki1

http://www.matec-conferences.org/articles/matecconf/pdf/2012/01/matecconf_csndd2012_00002.pdf

Date added: August 3, 2013 - Views: 2

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Welding Defects & Prevention - xpawel.com

Welding Defects & Prevention Defects Causes Preventive Measure Fibrous Structures There are columnar structures present in the fractured part of weld metal, which

http://xpawel.com/pdfs/Welding%20Defects.pdf

Date added: December 31, 2012 - Views: 26

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Study Of Defects In Friction Stir Welded AA 5083 By ...

of these defects. Heat input during the welding is dependent on the many factors like welding parameter ... located and disoriented defects like crack, porosity etc. Certain variations in welding parameter

http://www.ndt.net/article/nde-india2011/pdf/ext-pdf/1-VidyaJoshi.pdf

Date added: October 25, 2012 - Views: 13

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SECTION 20720 THERMITE RAIL WELDING - Caltrain

Chapter 4, Section 3.13, Specification for the Quality Assurance of Thermite Welding of Rail and Section 3.11, Specifications for Fabrication of Continuous ... Rail ends shall show no steel defects, dents, or porosity before welding.

http://www.caltrain.com/assets/_engineering/engineering-standards-2/Specs/Div20/20720.pdf

Date added: June 4, 2012 - Views: 51

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Butt welds - Size

Porosity Porosity. Cluster Porosity Cluster porosity. Worm Hole Herringbone porosity. Lack of Fusion ... 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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CT Inspection of Welding Seam for Half-Axles of Maneuverable ...

Welding seam defects, including porosity, inclusion and cracks, were observed by CT images, proving the effectiveness of CT inspection for welding seam half-axles of maneuverable aircraft’s stabilizers.

http://www.ndt.net/article/wcndt2012/papers/557_Qi_Rev1.pdf

Date added: October 12, 2012 - Views: 3

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11 - Google Code

11.2 Defects in arc welding A list of weld defects and their causes is given in Table 11.1.Other defects ... Thus voids, porosity, slag, cracks and defects of Weld defects and quality control 211. 212 The welding of aluminium and its alloys Intensifying screens Anti-back-scatter backing

http://database-jurnalku.googlecode.com/files/Weld%20defects%20and%20quality%20control.pdf

Date added: October 17, 2012 - Views: 78

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Submerged Arc Welding - ESAB

the joint or flux and resulting in porosity of the weld. If submerged arc welding must be carried out outdoors, special precautions should be taken, ... i.e. root defects. Submerged arc welding requires more expensive joint preparation than manual weld-ing.

http://www.esab.co.kr/Web-App/Upload/2012/04/05/SUBMERGED%20ARC%20WELDING.pdf

Date added: November 6, 2012 - Views: 26

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Overview of Shielding Gases - Linde Gas

welding thick aluminium sections with pure argon as the shielding gas, porosity, lack of penetration and fusion defects can be an issue. ... There are many ways in which a shielding gas can improve welding process performance. For example, ...

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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Visual detection welding defects in dust perception and ...

Visual detection welding defects in dust perception and correction ... cause of porosity is contamination during welding. Porosity is an indicator that welding parameter, consumables, or joint fitup were not properly controlled for the welding

http://www.iasj.net/iasj?func=fulltext&aId=45103

Date added: August 13, 2013 - Views: 5

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Porosity Formation and Prevention in Pulsed Laser Welding

Welding Porosity has been frequently observed in solidified, deep penetration pulsed laser welds. ... find methods to reduce or eliminate porosity defects. Over the years, some researchers have conducted experiments to investigate porosity formation in laser welding.

http://web.mst.edu/~tsai/publications/Zhou-JHT-2007-58.pdf

Date added: June 24, 2013 - Views: 4

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Welding Analysis

CLEMEX Welding Analysis Image Analysis Report # 692 ... The most common weld defects include: lack of fusion, lack or excess of penetration, porosity, inclusions, and cracking. Any of these defects are potentially disastrous, and quality control serves to identify the defect,

http://www.clemex.com/clemex/media/assets/pdf/Applications/Image-Analysis-Reports/692_WeldingAnalysis.pdf

Date added: May 26, 2013 - Views: 3

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WLD 204 Non Destructive Testing I Visual Testing

NSF-ATE Project Advanced Materials Joining for Tomorrow’s Manufacturing Workforce ... Welding Defects 24-42 Visual Inspection ASME Procedure 43-63 Visual Inspection ... surface porosity, cracks open to the surface, bead contour, ...

http://spot.pcc.edu/welding/NDTWEB/visual_inspection.pdf

Date added: November 20, 2013 - Views: 2

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Defect - Universiti Teknologi Malaysia

Defects and Discontinuities Tim Turner Elizabethtown Technical College ... • Porosity – Uniformly Scattered ... welding operation which adhere to the base metal surface. • Cause: Long arc length, severe electrode angles, high

http://www.fkm.utm.my/~zulkepli/lecture_slides/penyambungan/Defects&Discontinuities.pdf

Date added: May 15, 2012 - Views: 18

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Specialists in Gases and Welding Equipment Tech Talk

St. Louis’s Welding and Industrial Information Newsletter • Bug-O Helps NRE • New Cee Kay Web Site • New Miller Machines • Weld Defects Cee Kay Launches ... Porosity is among the mostcommonweld defects. Created Date:

http://ceekay.com/wp-content/uploads/2014/10/Tech-Talk-3rd-Quarter-2014.pdf

Date added: October 26, 2014 - Views: 1

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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 ... porosity, lack of penetration and undercutting) was evaluated by analyzing the linear correlation coefficient. iii) The most relevant features were

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

Date added: April 2, 2012 - Views: 14

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ALBERTA REGION WELDER TEST INFORMATION Rules & Regulations

company’s welding supervisor and return of the original “Welder Test Record” letter, ... Porosity & fusion type defects such as slag, lack of fusion and inadequate penetration • The maximum dimension of a single flaw must not exceed 2.6 mm

http://www.grbwelding.com/_CWB_Procedure_and_Rules.pdf

Date added: February 19, 2013 - Views: 1

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Porosity formation in CO2 laser welding of steel sheets

Porosity formation in CO2 laser welding 27 Welding experiment details C02 laser melt-run welding without back shielding Back shielding is not normally employed for laser welding

http://www.tandfonline.com/doi/pdf/10.1080/09507110209549485

Date added: October 26, 2014 - Views: 1