Evaluation of pipeline laser girth weld properties by Charpy (V) toughness and impact tensile tests

Bayraktar, E.; Hugele, Damien; Jansen, Jay; Kaplan, D.

doi:10.1016/j.jmatprotec.2003.10.008

Cited by 20 publications

(17 citation statements)

References 2 publications

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“…Evidently abrupt changes of mechanical behaviour create a mechanical heterogeneity that makes very complex to evaluate the toughness test results applied on the welded joints. The reason why, another type of toughness evaluation method based on impact tensile-simulated crash test has been developed (Grumbach and Sanz, 1972;Bayraktar et al, 2004b). General technical details about the new impact tensile crash test have been given previously in the different articles (Bayraktar et al, 2004a(Bayraktar et al, ,b,c, 2007b.…”

Section: Toughness Characterisation Of Laser Welds (Twbs)mentioning

confidence: 99%

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Comparative study: Mechanical and metallurgical aspects of tailored welded blanks (TWBs)

Bayraktar

Kaplan²,

Yilbaş

2008

Journal of Materials Processing Technology

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Section: Toughness Characterisation Of Laser Welds (Twbs)mentioning

confidence: 99%

“…For that a procedure of test specifically adapted was used for base metals and also welded joints (t < 4 mm) (Grumbach and Sanz, 1972;Bayraktar et al, 2004b).…”

Section: Introductionmentioning

confidence: 99%

Comparative study: Mechanical and metallurgical aspects of tailored welded blanks (TWBs)

Bayraktar

Kaplan²,

Yilbaş

2008

Journal of Materials Processing Technology

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“…These grades can be ordered according to the carbon values of the steels studied here like HV(409) < HV(430Ti) < HV(430). Naturally, the grade of the steel of 430 has a greater value than the other grades whereas the hardness value of base metal for all grades is found about 150 HV [3]. In fact, the grade of 430 gives a big hardness difference between weld bead and base metal for the LASER and RSW processes.…”

Section: Microstructural Evaluationmentioning

confidence: 92%

“…This research will contribute to the selection of optimal welding conditions and deep drawability for the development of new steel grades for automotive applications. Additionally, the behaviour of welded structures (WS, WM) or base metals (BM) during dynamic loading reproducing the conditions of collision is of special importance [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of welding conditions on the formability characteristics of thin sheet steels: Mechanical and metallurgical effects

Bayraktar¹,

Moiron²,

Kaplan³

2006

Journal of Materials Processing Technology

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“…Crack tip opening displacement tests in different modes were performed in some of the previously mentioned publications [10,11,[14][15][16][17]. Research on detecting the ductile-brittle transition temperature was done by Baryraktar et al in [2,18,19]. They were carrying out impact tensile testing to eliminate the influence of specimen bending and investigate pure crack initiation.…”

Section: • High Overmatching Situations (U T S F Z Ut S Bm )mentioning

confidence: 99%

Toughness evaluation of EB welds

Wiednig

Enzinger

2017

Weld World

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For over a hundred years, Charpy impact testing has been performed. It is one of the most frequently used material tests. Due to a very simple test setup, a huge wealth of experience and an enormous database of results, it is still state of the art to evaluate toughness of materials and welds. Modern welding technologies like laser welding or electron beam welding (EBW) are characterized by a low heat input. The high energy density of these technologies results in very narrow welds. These kind of joints are difficult to analyse by means of a standard Charpy test. The combination of weld cross section and properties lead in most cases to a fracture path deviation (FPD). Although the crack starts from a notch, it deviates during propagation into the heat-affected zone or even in the base material. Therefore, the weld itself is not tested and cannot be characterized. FPD is a wellknown issue but so far little attention in standards has been paid to this complex topic. Hence, establishing a valid welding procedure specification for beam welding procedures may imply difficulties. This work focuses on avoiding FPD in electron beam welds in soft-matensitic steel (1.4313) by using standard and side notched Charpy impact specimens. Valid toughness result had to be found for 20-and 100-mm-thick welds at −20 • C. Several test with three different kind of specimen in two different heat-treated conditions were carried out. It was found that beside the narrow seam a major reason for FPD is the significant overmatching of the weld. A post weld heat treatment to reduce overmatching facilitates testing but can decrease toughness. Adequate results for qualification were found and EB welds reached sufficient toughness at −20 • C. Toughness of EB welds was compared to the toughness of conventional gas metal arc welds (GMAW). Finally, a recommendation for adapting the toughness characterization for narrow and overmatching seams is proposed.

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Evaluation of pipeline laser girth weld properties by Charpy (V) toughness and impact tensile tests

Cited by 20 publications

References 2 publications

Comparative study: Mechanical and metallurgical aspects of tailored welded blanks (TWBs)

Comparative study: Mechanical and metallurgical aspects of tailored welded blanks (TWBs)

Effect of welding conditions on the formability characteristics of thin sheet steels: Mechanical and metallurgical effects

Toughness evaluation of EB welds

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