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Abstract:	Die Lebensdauer von dynamisch belasteten Bauteilen aus Stahl stellt ein entscheidendes Qualitätsmerkmal von Produkten der Stahlbau Firmen dar. Der Einsatz höherfrequenter Hämmerverfahren, im Besonderen des UIT oder HiFIT-Verfahrens, als lebensdauerverlängernde Maßnahme von ermüdungsbeanspruchten Schweißverbindungen wurde im Rahmen des REFRESH-Forschungsprojekts erstmals wissenschaftlich untersucht. Einsatz und Wirksamkeit der Verfahren wurde von den am Projekt beteiligten Firmen an ausgeführten Bauteilen untersucht. Die Erkenntnisse aus Versuchen und praktischer Anwendung der Firmen Schachtbau Nordhausen und Maurer Söhne werden im folgenden Artikel geschildert. Tests and application of high frequency peening as a post weld treatment method. The fatigue life of dynamic loaded steel construction elements is an influential quality characteristic for products of steel fabricators. The application of high frequency peening, especially the UIT (ultrasonic impact treatment) or the HiFIT (high frequency impact treatment) as a method to extend the fatigue life of welded connections, has been investigated in course of the research project called REFRESH for the first time. The practical application and the effectiveness of high frequency peening at finished building components have been examined by building companies which are concerned to the research project. The present paper describes the tests and the practical application of the companies Schachtbau Nordhausen and Maurer Söhne.
Source:	Stahlbau 78 (2009), No. 9
Page/s:	650-661
Language of Publication:	German

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