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DEFECTS IN WELDING - HCMUT - Project Management...

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DEFECTS IN WELDING - HCMUT - Project Management...

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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Chapter Weld Inspection and Repair -...

technique used depends on the material, weld thick-ness, welding process, ... Porosity, wormhole Figure 18-32. The defects shown can occur in the interior

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

Date added: February 27, 2013 - Views: 37

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Common Weld Defects - Causes and Cures - Qualimet

Common Weld Defects – Causes and Cures ... Porosity cannot be repaired by welding overtop of the problem. Grind out to remove the porosity, then re-weld.

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

Date added: January 16, 2014 - Views: 3

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Welding Defects & Prevention - PAWEL | Pakistan ...

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: 27

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Weld Defects and How to Avoid Them

Weld Defects and How to Avoid Them Needless to say, such grisly possibilities keep ... used in most welding processes. Porosity is usually

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

Date added: March 12, 2013 - Views: 26

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WELDING DEFECTS Welding defects, causes and...

WELDING DEFECTS Welding defects can ... unstable arc, arc gap too short and poor welding technique in general. Porosity can be minimized in many different ways – by the

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

Date added: February 20, 2012 - Views: 799

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Formation and Distribution of Porosity in Al-Si ...

Nevertheless, welding can generate defects, such as porosity or hot cracking, ... welding, porosity content could be decreased by the addition of SiCl4 in shielding

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

Date added: December 28, 2011 - Views: 14

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

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: 4

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Structural Steel Welding - Schnitzhofer and...

Structural Steel Welding Semih ... Most welds contain defects (porosity, cracks ... The course describes the sources that are responsible for welding defects ...

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

Date added: December 20, 2011 - Views: 257

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Effects of Porosity on Mechanical Properties of...

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

https://app.aws.org/wj/supplement/WJ_1970_07_s322.pdf

Date added: May 29, 2015 - Views: 1

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9. Welding Defects - kau.ac.kr

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: 470

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Effects of Porosity on High Strength Aluminum 7039

Effects of Porosity on High Strength Aluminum 7039 Porosity reduces both weld metal ductility and fatigue life but does not significantly affect yield strength

https://app.aws.org/wj/supplement/WJ_1970_07_s311.pdf

Date added: April 8, 2015 - Views: 1

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Welding Defects

Welding Defects •Cracks •Cavities •Solid inclusions •Imperfect shape or unacceptable contour •Incomplete fusion •Miscellaneous defects

http://www.msrpco.com/maghalat/joshdefect.pdf

Date added: June 29, 2015 - Views: 1

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The ultrasonic wave interaction with porosity ...

The ultrasonic wave interaction with porosity defects in welded rail head ... 4. Railway applications-Track Aluminothermic welding of rails. British

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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Weld Defects-Their Causes and How to Correct Them

Weld Defects-Their Causes and How to Correct Them With the correct welding conditions, techniques and material quality standards, the mig process will yield a very ...

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

Date added: May 23, 2014 - Views: 2

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Structural Steel Welding - Civil and Environmental...

Structural Steel Welding Semih Genculu, P.E. 2007 PDH Center 2410 Dakota Lakes Drive ... 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: 112

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Lecture 6 Weldability and defects in weldments

Weldability and defects in weldments Subjects of Interest ... www.mig-welding.co.uk Porosity observed in aluminium welded specimen after fractured. Porosity Cracks

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

Date added: May 18, 2012 - Views: 146

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Welding problems and defects – causes and...

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

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

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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Submerged Arc Welding - ESAB

1 SUBMERGED ARC WELDING ... 6 WELD DEFECTS 30 Arc blow porosity • Change to a different wire grade • Change the wire to positive polarity • Reduce the arc voltage

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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Porosity in Thermite Welds - Home | Fracture...

Porosity in Thermite Welds ... What is Thermite Welding? ... – Pores are much more serious defects. 6 Porosity and fatigue strength. 7

http://fcp.mechse.illinois.edu/files/2014/07/Chen-presentation.pdf

Date added: February 1, 2015 - Views: 1

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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 ...

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

Date added: September 25, 2014 - Views: 2

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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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PULSED LASER WELDING - Welding Consultant

vs. keyhole), residual stress, and related defects such as porosity and ... Porosity can form in a laser weld ... Laser welding is a non-contact autogenous welding ...

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

Date added: December 21, 2011 - Views: 24

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WELDING DEFECTS - Indian Railways

What should be done when Welding-defects are detected? One should reject the items and put them ... –surface porosity –excessive spatter –Arc strike, etc

http://www.irimee.indianrailways.gov.in/instt/uploads/files/1434529014349-welding%20defects.pdf

Date added: June 21, 2015 - Views: 1

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Shielding gas. Gases for all types of stainless...

used for TIG welding stainless steel than for steel, ... 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: 5

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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 ... surface porosity, incomplete root

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

Date added: September 27, 2012 - Views: 58

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Shielding gases.

welding thick aluminium sections with pure argon as the shielding gas, porosity, lack of penetration and fusion defects can ... a shielding gas can improve welding

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...

Visual detection welding defects in dust perception and correction ... cause of porosity is contamination during welding. Porosity is an indicator that welding

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

Date added: August 13, 2013 - Views: 6

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Typical Joint Defects in Laser Welding of...

Typical Joint Defects in Laser Welding of Aluminium-Lithium Alloy J Yang1, 2, S Gang2, X Li1, ... welding processes; porosity was also different in shape and

http://link.springer.com/content/pdf/10.1007/978-1-84996-432-6_130.pdf

Date added: June 29, 2015 - Views: 1

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

4th International Symposium on Friction Stir Welding, Park City, Utah, USA, 14-16 May 2003 FLAWS IN FRICTION STIR WELDS A J Leonard and S A Lockyer

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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Weld Integrity of High Strength Steels

Strength Steels Yong-Yi Wang ... welding defects, such as porosity, slag, undercut, etc. The old weld can fail from those welding defects.

http://www.boulder.nist.gov/div853/Weld_Join_Workshop_06/PROC/Files/6.5%20Keynote%20-%20Wang.pdf

Date added: December 7, 2011 - Views: 9

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WLD 204 Non Destructive Testing I Visual Testing

Welding Defects 24-42 Visual Inspection ASME Procedure 43-63 Visual Inspection Labs ... Such discontinuities as undercut, cracks, surface porosity, inadequate

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

Date added: November 20, 2013 - Views: 2

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Field Welding Inspection Guide - Ohio Department...

Field Welding Inspection Guide Assistance in interpretation of any specification or questions concerning field welding issues can be obtained from the Office of ...

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

Date added: October 21, 2011 - Views: 378

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Porosity Formation and Prevention in Pulsed Laser...

Welding Porosity has been frequently observed in solidified, deep penetration pulsed laser welds. ... find methods to reduce or eliminate porosity defects.

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

Date added: June 24, 2013 - Views: 4

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Finite element modeling of the aluminothermic ...

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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Casting Defects and Design Issues - Georgia...

Casting Defects and Design Issues ... Disadvantages of Casting • Shrinkage, porosity, cracks • No strain hardening –can be brittle • Tooling can be expensive

http://www-old.me.gatech.edu/jonathan.colton/me4210/castdefect.pdf

Date added: May 29, 2012 - Views: 416

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SECTION 20720 THERMITE RAIL WELDING - caltrain.com

September 30, 2011 THERMITE RAIL WELDING SECTION 20720 THERMITE RAIL WELDING ... 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: 58

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Defects Introduced into Metals During Fabrication...

Porosity 2.1.5. Surface Defects 2.1.6. Other Defects 2.2. ... book concentrates on the process of welding and details many of the defects associated with joining

http://www.eolss.net/Sample-Chapters/C05/E6-36-04-01.pdf

Date added: April 29, 2012 - Views: 76

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Weld Defects - PersianGIG

Weld Defects. Lack of Side Wall Fusion. Lack of Inter Run Fusion. Porosity. Slag Inclusions. ... Surface Breaking Porosity. Cracking. Arc Strikes. Crater Pipe. Title:

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

Date added: June 11, 2012 - Views: 29

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Lean Manufacturing Application on Welding Defects...

Lean Manufacturing Application on Welding Defects in Cryogenic Vessel Ajay K Solanki1, Mit Pandya2, ... Porosity 4 4 50% Lack of Fusion 3 7 88%

http://www.ijetae.com/files/Volume4Issue10/IJETAE_1014_85.pdf

Date added: November 23, 2014 - Views: 2

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THE IMPACT OF THE INTERNAL WELDING DEFECTS ON THE...

welds, slags and porosity. ... The impact of the internal welding defects on the joint strength were very similar – the defects nearer to the surface de-

http://www.tandfonline.com/doi/pdf/10.3846/1648-4142.2008.23.240-244

Date added: May 21, 2015 - Views: 1

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Radiographic Interpretation - PersianGIG

Defects which may be detected by visual inspection ... Gas pore Cluster porosity Loss of gas shield ... caused by some welding process Slag originates from welding

http://irwelding.persiangig.com/document/oube%20joosh/DEFECT.3.pdf

Date added: May 26, 2012 - Views: 59

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Design of Weld Joints and Welding Errors...

DESIGN OF WELD JOINTS & WELDING ERRORS ... Welding errors and failures: Porosity ... Cracks are perhaps the most serious of the defects that occur in the welds or weld

http://www1.gantep.edu.tr/~oyilmaz/Lecture%20Notes/ME%20473/Design%20of%20Weld%20Joints%20and%20Welding%20Errors.pdf

Date added: November 23, 2012 - Views: 10

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Low Hydrogen SMAW Electrodes - Lincoln Electric...

Welding consumables can be classified with an optional diffusible ... Even a small amount of moisture over this level can cause weld porosity and other defects.

http://www.lincolnelectric.com/assets/us/en/interactive/images/excalibur7018mr/low-hydrogen-smaw-electrodes.pdf

Date added: September 26, 2014 - Views: 5

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SECTION 20710 FLASH BUTT RAIL WELDING -...

Rail ends shall be square and smooth, and shall show no steel defects, dents or porosity before welding. ... September 30, 2011 FLASH BUTT RAIL WELDING H.

http://www.caltrain.com/assets/_engineering/engineering-standards-2/Specs/Div20/20710.pdf

Date added: April 25, 2012 - Views: 63

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FIELD WELDING - South Dakota Department of...

Field welding is done with a covered ... Weld Defects Types of Weld ... Re-Weld to Proper Size . Porosity: Cavities Caused by Trapped Gases.

http://www.sddot.com/transportation/bridges/docs/Chapter10Welding.pdf

Date added: November 10, 2013 - Views: 1

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Low speed laser welding of aluminium alloys using...

Low speed laser welding of aluminium alloys using single-mode iber lasers 49 application is the fusion of fatigue cracks in aluminium parts, where a crack path is

http://cdn.intechopen.com/pdfs/11499/InTech-Low_speed_laser_welding_of_aluminium_alloys_using_single_mode_fiber_lasers.pdf

Date added: July 10, 2013 - Views: 1

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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 ...

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

Date added: March 9, 2014 - Views: 7