3D analysis of micro-deformation in VHCF-loaded nodular cast iron by μCT
| Autor: | Gottfried Fischer, Jens Nellesen, H. Riesemeier, Wolfgang Tillmann, K. Ehrig, N. B. Anar |
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| Rok vydání: | 2013 |
| Předmět: |
Digital image correlation
Materials science Strain (chemistry) Mechanical Engineering Metallurgy Synchrotron radiation engineering.material Condensed Matter Physics Microstructure Mechanics of Materials engineering General Materials Science Monochromatic color Tomography Cast iron Composite material Deformation (engineering) |
| Zdroj: | Materials Science and Engineering: A. 577:202-209 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2013.04.057 |
| Popis: | The impact of very high cycle fatigue (VHCF) load conditions on the microstructure of specimens consisting of nodular cast iron is analyzed by means of micro-computed tomography ( μ CT ) utilizing both monochromatic synchrotron radiation and polychromatic X-ray tube radiation. Using 3D μ CT , the microstructure in the region of the smallest cross-sections of shouldered round specimens is imaged in different stages of the VHCF loading. By digital image correlation (DIC) of these tomograms strain fields are analyzed three-dimensionally. Strain levels in the range of a few percent were detected. It is proven that a localization of strain allows to predict the site of the crack which precedes and induces the macroscopic failure of the specimens. |
| Databáze: | OpenAIRE |
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