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Article Dans Une Revue Materials Science and Engineering: A Année : 2014

Experimental investigation of the behavior and the low cycle fatigue life of a welded structure

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Résumé

Strain controlled low cycle fatigue tests are performed at 300 °C under tension compression on an 18%Cr ferritic stainless steel using base metal and welded specimens. Changes in the microstructure and geometry of the weld bead have a negative impact on the specimens' lifetime. Digital image correlation is used to get information on strain gradient in specimens. Potential drop measurements as metallographic observations are used to monitor micro-cracking. The significance of the results is discussed using finite element computations of welded specimens and observations of fracture surfaces. A tentative rationale is proposed using an energy based micro-crack growth model.
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Dates et versions

hal-00941722 , version 1 (04-02-2014)

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Aurélie Benoit À La Guillaume, Luc Rémy, Alain Köster, Habibou Maitournam, F. Oger. Experimental investigation of the behavior and the low cycle fatigue life of a welded structure. Materials Science and Engineering: A, 2014, 595, pp.64-76. ⟨10.1016/j.msea.2013.11.082⟩. ⟨hal-00941722⟩
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