Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
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Thomas Nitschke-Pagel
Abstract
Many investigations have revealed the beneficial effect of mechanical surface hardening in combination with induced compressive residual stresses leading to improved fatigue strength. The benefit will be higher, the higher the quality of the weld is. On the other hand, methods like shot peening are useless if the weld toe profile is poor and the connected notch effect strong. Increased fatigue strength is then only possible after a post weld treatment which produces a smoother shape of the weld toe. Experiments reveal that methods which aim to increase the intensity of the penetration depth do not necessarily produce the best fatigue performance. High intensities of the mechanical surface treatments, especially in ductile aluminium alloys, may produce new geometrical defects which may work against the benefit of the deeper penetration depth of cold hardening and compressive residual stresses. A systematic evaluation of the results of improvement methods is possible with the help of the local fatigue strength concept, which compares the local strength properties and the local load stresses.
Literatur
[1] B.Müsgen: Komm. der Europ. Gemeinschaften, Technische Forschung Stahl, EUR 7634, 1982.Suche in Google Scholar
[2] F.Haagensen, in: C. Nordhoek, J. de Back (Eds.), Steel in Marine Structures, Proc. 3nd Int. ECSC Offshore Conf. (SIMS '87), Delft, The Netherlands, June 15–18, 1987, S. 689–698, Elsevier Science Publishers B.V.Suche in Google Scholar
[3] S.J.Maddox, S.Manthegi: IIW-Doc. XIII-2006-04, August 2004.Suche in Google Scholar
[4] P.J.Haagensen: IIW-Doc. XIII-1748-98, August 1998.Suche in Google Scholar
[5] C.M.Sonsino, C.Morgenstern, A.Hobbacher, F.Sorbo: IIW-Doc. XIII-2009-045, August 2004.Suche in Google Scholar
[6] H.Wohlfahrt, P.Krull (Eds.): Mechanische Oberflächenbehandlungen: Grundlagen – Bauteileigenschaften – Anwendungen. WILEY-VCH-VerlagWeinheim2000.Suche in Google Scholar
[7] J.Heeschen: Diss. 1986, Univ. Gh Kassel (1986).Suche in Google Scholar
[8] T.Nitschke-Pagel, H.Wohlfahrt, in: L. Wagner (Ed.), Proc. of the 8th Int. Conf. on Shot Peening, Viley-VCH2003, S.360–366.Suche in Google Scholar
[9] T.Nitschke-Pagel: Abschlußbericht zum Teilprojekt “Auswirkungen von Nachbehandlungsverfahren auf die Schwingfestigkeit lasergeschweißter Stumpfnähte“. Bericht LUFO II, Airbus Industries2003.Suche in Google Scholar
[10] E.Macherauch, H.Wohlfahrt, in: D.Munz (Ed.), Ermüdungsverhalten metallischer Werkstoffe, DGM-Informationsgesellschaft Verlag, Oberursel1985, S. 237–283.Suche in Google Scholar
[11] P.J.Haagensen: IIW-Doc. XIII-WG2-30. 08/1994.Suche in Google Scholar
[12] T.Nitschke-Pagel, H.Wohlfahrt, in: DVM-Bericht 127, Dt. Verband für Materialforschung und -prüfung e.V., Berlin2000, S. 211–228.Suche in Google Scholar
[13] Th.Nitschke-Pagel: in [6].Suche in Google Scholar
© 2006, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Basic
- Microcracks in superalloys: From local in-situ measurements to lifetime prediction
- Residual stress development due to thermal cycling of the particle-reinforced alloy EN AW-6061– experiment and simulation
- Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
- The nature of the TRIP-effect in metastable austenitic steels
- Investigation and modelling of theplasticity-induced martensite formation in metastable austenites
- Thermal relaxation of residual stresses in TiN films deposited by arc ion plating
- On the Hall–Petch relation between flow stress and grain size
- Polymer-derived Si–C–N ceramics reinforced by single-wall carbon nanotubes
- Applied
- Strengthening of silicon nitride ceramics by shot peening
- Assessment of creep behaviour of the die-cast cylinder-head alloy AlSi6Cu4-T6
- New aspects of bending rotation fatigue in ultra-fine-grained pseudo-elastic NiTi wires
- Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
- Investigation of the thermoelastic response of long-fibre reinforced thermoplasticsby comparison with different non-contactstrain measurement techniques
- Effect of surface roughening on increasingthe spectral selectivity of cermet solarselective absorbers
- Experimental observations on thecorrelation between microstructure andfracture of multiphase steels
- Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Basic
- Microcracks in superalloys: From local in-situ measurements to lifetime prediction
- Residual stress development due to thermal cycling of the particle-reinforced alloy EN AW-6061– experiment and simulation
- Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
- The nature of the TRIP-effect in metastable austenitic steels
- Investigation and modelling of theplasticity-induced martensite formation in metastable austenites
- Thermal relaxation of residual stresses in TiN films deposited by arc ion plating
- On the Hall–Petch relation between flow stress and grain size
- Polymer-derived Si–C–N ceramics reinforced by single-wall carbon nanotubes
- Applied
- Strengthening of silicon nitride ceramics by shot peening
- Assessment of creep behaviour of the die-cast cylinder-head alloy AlSi6Cu4-T6
- New aspects of bending rotation fatigue in ultra-fine-grained pseudo-elastic NiTi wires
- Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
- Investigation of the thermoelastic response of long-fibre reinforced thermoplasticsby comparison with different non-contactstrain measurement techniques
- Effect of surface roughening on increasingthe spectral selectivity of cermet solarselective absorbers
- Experimental observations on thecorrelation between microstructure andfracture of multiphase steels
- Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability
- DGM News
- DGM News
