Prediction of Size and Position of Fracture Relevant Defects of Samples Fatigued in the VHCF Area on the Basis of Metallographic Examinations
| Autor: | Edgar Kaufmann, Anton Kolyshkin, Hans-Juergen Christ, Martina Zimmermann, Andrei Grigorescu |
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| Rok vydání: | 2016 |
| Předmět: |
Austenite
Materials science Metallurgy Metals and Alloys Fatigue testing 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Durability Electronic Optical and Magnetic Materials 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Position (vector) Material quality Range (statistics) Fracture (geology) 0210 nano-technology Sheet steel |
| Zdroj: | Practical Metallography. 53:435-449 |
| ISSN: | 2195-8599 0032-678X |
| Popis: | This paper aims to examine the connection between the material quality with regard to the size and spatial distribution of the defects and the size or position of the defects causing the fracture which determine the durability of components in the range of Very High Cycle Fatigue (VHCF). For this purpose, the quality of the metastable austenitic steel 1.4301 was characterized via metallographic examinations. Longitudinal and cross sections were taken from a sheet steel. Afterwards size and position of all defects were measured. The metallographic information acquired was used to create a statistical defect distribution model. On the basis of this model and the stress distribution in the most stressed area of the used fatigue samples, the distribution of size and position of the inclusions relevant for the fatigue failure could be predicted. The results of the modelling are in good agreement with the experimental observations regarding the positions of crack initiation on samples failing under VHCF circumstances. |
| Databáze: | OpenAIRE |
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