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Kranz B.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Sonsino C.M.,Fraunhofer Institute for Structural Durability and System Reliability
Welding in the World | Year: 2010

For the verification of the FAT225 value suggested in the IIW Recommendations for the notch stress concept with the reference radius R ref = 1.00 mm and of FAT630 for Rref= 0.05 mm, investigations were carried out with fully and non-fully penetrated welds, and with non-fully penetrated welds with circular and long holes. The FAT values were confirmed by fatigue tests carried out under the stress ratio R = 0.5. However, in the case of low stress concentrations, e.g. weld toes of butt welds, when Rref = 0.05 mm is applied, the FAT class should be downgraded from 630 to 400 MPa to account for the size effect of larger maximum stressed material volumes.


Wagner S.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Kranz B.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Wolski U.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Muglitz J.,ZIS Industrietechnik GmbH | Krink V.,Kjellberg Finsterwalde Plasma und Maschinen GmbH
Proc. of the Int. Conf. on Advances in Welding Science and Technology for Construction, Energy and Transportation, AWST 2010, held in Conj. with the 63rd Annual Assembly of IIW 2010 | Year: 2010

Plasma marking has effects on the static and fatigue strength of constructions. These effects must be known for a dimensioning of constructions. The objective of intensive investigations was to clarify these relations. For these specimens were plasma marked varying the plasma current to produce high quality labelled surfaces under industrial aspects. The material testing of these specimens includes macro-sections for determining the shape, mark depth and hardness in heat affected areas. Impact and tensile tests have been carried out to characterise the static strength. Finally, S-N curves were determined to check the fatigue behaviour compared to non-marked specimens as well as with the results of numerous punch marked steels and with the IIW recommendations for fatigue design of welded joints and components.


Keitel S.,Helmholtz Center for Heavy Ion Research | Neubert J.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Strofer M.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH
Proc. of the Int. Conf. on Advances in Welding Science and Technology for Construction, Energy and Transportation, AWST 2010, held in Conj. with the 63rd Annual Assembly of IIW 2010 | Year: 2010

To increase efficiency in pipeline construction, examinations on new welding processes for joining of pipes are indispensable. To this end, increasing productivity of the welding process but also requirements on the material are of immediate importance. Hence, a possible alternative is laser beam GMA hybrid welding. The technological approach is the use of the laser typical deep penetration effect for the generation of a high quality free root pass or a complete weld in one step. The results of the technology and equipment developments and their performance under construction site similar conditions are given by this presentation. A high laser power and the advantages of its guidance via fiber optics allow the use of orbital welding.


Kranz B.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Wagner S.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Keitel S.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH
Stahlbau | Year: 2015

The actors in the chain beginning with the design via calculation, construction to manufacturing and assembling have to assume corresponding responsibilities. The fabrication-relevant design specifications have to be considered already in the design. Responding to requirements that arise from the design is important in the production, too. A self-contained set of rules exists in the steel construction sector. The standard series DIN EN 1990, DIN EN 1991 and DIN EN 1993 et seqq. are the base for structural designers and constructing engineers, and DIN EN 1090 is the base for the manufacturers and assembly operators. With the introduction of DIN EN 1090 the design and construction are also included in checking for conformity at the currently applicable regulations. After two years of experience in this area it is to be noted that the rules have largely been mastered in terms of design and construction. The fabrication-related requirements of DIN EN 1090 are, however, often still insufficiently taken into account. The resulting problems are presented as well as solutions. A contribution of an appropriate education and training will be presented. © 2015 Wiley Blackwell. All rights reserved.

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