Experimental investigation of the behavior and the low cycle fatigue life of a welded structure
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 correlat...
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Published in | Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 595; pp. 64 - 76 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier B.V
10.02.2014
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | 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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ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/j.msea.2013.11.082 |