Fatigue lifetime assessment procedures for welded pressure vessel components

Rudolph, Jürgen; Schmitt, Carsten; Weiß, E.

doi:10.1016/s0308-0161(01)00139-9

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Based on the measurements of the 23 analyzed test specimens, the average value of the weld notch radius after TIG-dressing was 3.7 mm. Similar results were found in previous research by Ramalho et al [16], Rudolph et al [17] and Tateishi et al [27], as presented in Table 4. The hardness of the weld areas was measured with the Vickers method (HV) in the TIG-dressed condition.…”

Section: Measurementssupporting

confidence: 92%

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Fatigue strength assessment of TIG-dressed ultra-high-strength steel fillet weld joints using the 4R method

Mettänen

Nykänen

Skriko

et al. 2020

International Journal of Fatigue

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Section: Measurementssupporting

confidence: 92%

“…In the literature, many studies have shown the improvement of fatigue strength obtained by using TIGdressing [10][11][12][13][14][15][16][17]. Huo et al [13] reported that the fatigue strength increased by 37 % and the fatigue life by 2.5 times after TIG-dressing.…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength assessment of TIG-dressed ultra-high-strength steel fillet weld joints using the 4R method

Mettänen

Nykänen

Skriko

et al. 2020

International Journal of Fatigue

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“…The macroscopic weld geometry is considerably improved by an average increase of 48 % concerning the flank angle and 115 % concerning the weld toe radii according to [14]. The favourable effect of blunting the weld toe notch is multiplied by the effect of using materials of higher static strength, which yields a considerable total improvement in the fatigue behaviour of the welded joint [6,7]. IIW recommendations on post weld improvement by burr grinding [11].…”

Section: Post Weld Treatment By Grinding or Tig Dressingmentioning

confidence: 99%

“…The geometry of the weld seam is well defined, the crack like defects at the weld toes are removed and the static strength properties of the material used become significant. Considerable improvements in fatigue strength in general and particularly an increase in the endurance limit are characteristic [7]. In fact, the fatigue behaviour will be similar to that of non-welded components [8].…”

mentioning

confidence: 99%

Endurance Limit of Ground and TIG Dressed Steel Welded Joints under Proportional Loading

Rudolph¹

2003

Chemie Ingenieur Technik

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Post weld treatment methods such as disk and burr grinding or TIG dressing improve the fatigue performance of steel welded joints. As the crack like defects at the weld toes are removed, a significant increase in fatigue strength and particularly in the endurance limit is achieved. This improvement in the fatigue behaviour is currently considered by bonus factors based on general experimental observations. No code‐based design approach for the assessment of the endurance limit of these components is available currently. As the fatigue behavior of these types of welded joints is similar to that of non‐welded and notched components established design methodologies, such as the local strain approach, are appropriate tools for these purposes. Furthermore, this design approach is open to extension to the finite life region and even the low cycle fatigue regime.

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“…A qualidade do retrabalho depende da combinação dos parâmetros de operação e da habilidade do soldador, sendo que este último é um fator de relevância que está relacionado ao tempo de experiência do soldador, pois o processo requer destreza e agilidade para obter sucesso e resultar em juntas com alto índice de confiabilidade (47) .…”

Section: Reparo Por Soldagem Em Juntas Soldadasunclassified

Caracterizações microestruturais e avaliações das propriedades mecânicas das juntas em aço inoxidável AISI 301 L soldadas por MIG e submetidas ao reparo pelo processo TIG

Souza¹

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The welding has great importance in manufacture of subway cars because it is used in the manufacture of structural components and finishing in passenger cars which are mostly stainless steel. Joints may show the presence of discontinuities. The discontinuities are interruptions that affect the mechanical and metallurgical properties of the weld. The presence of these discontinuities, depending on their size, nature or the combined effect may lead to failure of the weld either by reduction of mechanical properties or non-acceptance criteria established in standards. A structure that has a weld failed during its qualification or inspection by the presence of discontinuities can be retrieved through a rework to be done in this joint. The remelting of the weld using the TIG process without the use of additional material, rework is a technique that can be employed in particular the technical and economic feasibility of the process. This study analyzes the influence that the process of TIG welding rework has on mechanical behavior and microstructure of welded joints by means of: mechanical tests (tensile and Vickers hardness), non-destructive testing (visual inspection and liquid penetrant) and characterization microstructure of the weld. Results of tensile test specimens and fatigue indicated that the repair of the weld beads did not change the mechanical behavior of joints. The joints subjected to repair in which they were removed the ribs of the beads showed changes in the mechanical properties, but also had satisfactory results.

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Fatigue lifetime assessment procedures for welded pressure vessel components

Cited by 11 publications

References 7 publications

Fatigue strength assessment of TIG-dressed ultra-high-strength steel fillet weld joints using the 4R method

Fatigue strength assessment of TIG-dressed ultra-high-strength steel fillet weld joints using the 4R method

Endurance Limit of Ground and TIG Dressed Steel Welded Joints under Proportional Loading

Caracterizações microestruturais e avaliações das propriedades mecânicas das juntas em aço inoxidável AISI 301 L soldadas por MIG e submetidas ao reparo pelo processo TIG

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