Analysis of Crack Morphologies and Patterns from Thermal Fatigue Using X-ray Tomography
| Autor: | Burkhard Fischer, Ana Ruiz, Stefan Ripplinger, Mohita Gupta, Karl-Fredrik Nilsson, Matthias Bruchhausen |
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| Rok vydání: | 2014 |
| Předmět: |
Diffraction
Thermal fatigue Materials science thermal fatigue Paris law business.industry Cyclic plasticity cyclic plasticity X-ray Fatigue damage Fracture mechanics General Medicine Structural engineering Time-of-flight diffraction ultrasonics 316L time-of-flight diffraction mental disorders Tomography Composite material business X-ray tomography |
| Zdroj: | Procedia Materials Science. 3:2180-2186 |
| ISSN: | 2211-8128 |
| DOI: | 10.1016/j.mspro.2014.06.353 |
| Popis: | The paper describes different assessment techniques such as X-ray computed tomography and time-of-flight diffraction (TOFD) for mapping of complex but representative thermal fatigue damage in 316L steel pipes. The observed damage patterns are very complex with interacting circumferential and axial cracks. It was confirmed by detailed microscopic post-test analyses that TOFD measures the crack depth reasonably well but only X-ray tomography reveals the full three-dimensional character of the fatigue damage. The fatigue life of the component was also modelled by a Paris’ crack propagation and non-linear kinematic cyclic plasticity model with a single crack. The crack depth vs. number of cycles was captured surprisingly well indicating that crack interaction did not play a major role for the assessment of the fatigue life. |
| Databáze: | OpenAIRE |
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