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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: 34

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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 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/at_download/file

Date added: March 7, 2014 - Views: 2

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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 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 & 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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s!4H=MsM! Effect of Defects on Fatigue Strength of...

s!4H=MsM! Effect of Defects on Fatigue Strength of GTAW Repaired Cast Aluminum Alloy Fatigue test data were analyzed to determine the relationship between defects

https://app.aws.org/wj/supplement/WJ_2006_11_s264.pdf

Date added: April 7, 2015 - Views: 1

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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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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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Structural Steel Welding - Schnitzhofer and...

Structural Steel Welding Semih Genculu, P.E. 2011 ... Porosity: Gas pockets are ... The course describes the sources that are responsible for welding defects and

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

Date added: December 20, 2011 - Views: 255

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Causes and Cures of Common Welding defects

Causes and Cures of Common Welding defects Welding Type worm hole Defect: Blow Hole blow hole worm hole Why What to Do SMAW CO2/MAG 1.Unclean base metal surface.

http://www.tientai.com/web2010E/Download/tool/3.pdf

Date added: October 24, 2012 - Views: 71

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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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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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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 ... 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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Porosity Defects in Iron Other methods for...

Porosity defects in all gray iron castings formed readily when unbalanced binder ratios, favoring excess polyisocyanate, were employed. Porosity defects that formed

http://www.asi-alloys.com/pdf/Naro.pdf

Date added: July 9, 2013 - Views: 11

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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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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: 464

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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: 108

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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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PULSED LASER WELDING - Welding Consultant

PULSED LASER WELDING Girish Kelkar, ... vs. keyhole), residual stress, and related defects such as porosity and cracks. ... Porosity can form in a laser weld for

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

Date added: December 21, 2011 - Views: 24

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Defects/Repairs - PersianGIG

Herringbone porosity Arc length too large ... QU 3. Give five defects, which may occur when welding carbon steel using the MMA welding process with the current

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

Date added: July 8, 2012 - Views: 35

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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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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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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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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: 57

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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: 368

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welding defects and their causes - Bing

Porosity is one of the first weld defects encountered by all welders in almost all processes. ... WELDING DEFECTS Welding defects, causes and correction

http://pdfsdir.com/download/welding-defects-and-their-causes.pdf

Date added: April 23, 2014 - Views: 3

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Porosity in Thermite Welds - publish.illinois.edu

Porosity in Thermite Welds ... FCP -2001. 2 What is Thermite Welding? • Thermite weld --A welding technique to utilize ... – Pores are much more serious defects. 6

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

Date added: August 11, 2014 - Views: 1

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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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OPEN ACCESS Journal

After analyzing the past data on welding defects it was decided to focus on porosity ... it can be observed that majority of the defects are due to the porosity and

http://www.ijmer.com/papers/Vol5_Issue5/Version-3/E0505_03-3848.pdf

Date added: May 29, 2015 - Views: 1

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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: 142

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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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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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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: 74

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SECTION 20720 THERMITE RAIL WELDING - Caltrain

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: 58

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FIELD WELDING - South Dakota Department of...

Defects and be Cleaned 2” Each Side of Weld: ... General Field Welding Procedures ... Porosity • Cracks • Spatter ...

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

Date added: November 10, 2013 - Views: 1

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Visual detection welding defects in dust...

Visual detection welding defects in dust perception and correction ... Porosity one of main defects where occurred by gas entrapment during solidification.

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

Date added: August 13, 2013 - Views: 5

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

located and disoriented defects like crack, porosity etc. Certain variations in welding parameter generate the defects in the weld due to improper heat input. In this ...

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

Date added: October 25, 2012 - Views: 15

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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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NDT Images - Carestream Health

understand a wide variety of casting and welding defects that appear on images obtained during images will ... Section IV 55 Cluster Porosity Defects in 57 Excess ...

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

Date added: October 2, 2012 - Views: 30

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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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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: 8

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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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Welding Pressure Pipeliners and Piping Systems

The following are the guidelines to minimize welding defects related ... • To avoid starting porosity, the electrode angle should be maintained

http://www.lincolnelectric.com/assets/US/EN/literature/C2420.pdf

Date added: April 11, 2013 - Views: 97

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FORMATION MECHANISMS OF WELD DEFECTS AND DYNAMIC...

FORMATION MECHANISMS OF WELD DEFECTS AND ... bead and porosity which are main part of the welding defect attributed to the powerful vaporizing pressure of zinc.

http://www.worldscientific.com/doi/pdf/10.1142/9789812793034_0046

Date added: April 20, 2015 - Views: 3

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CT Inspection of Welding Seam for Half-Axles of...

Welding seam defects, such as porosity, inclusion and crack, were observed by CT images, proving the effectiveness of CT inspection for welding seam ...

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

Date added: October 12, 2012 - Views: 3