Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1575496 | Materials Science and Engineering: A | 2014 | 13 Pages |
Abstract
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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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A. Benoit, L. Rémy, A. Köster, H. Maitournam, F. Oger,