Zur Sprödbruchsicherheit von Erzeugnissen aus Stahlguss

Brittle fracture safety of products of cast steel.

Cast steel components are frequently used for highly stressed, thick-walled products. In addition to the proof of serviceability and load-bearing capacity, a sufficient safety against brittle component failure is to be ensured even outside of the welding ends for these components due to the material discontinuities and the resulting stress peaks. Simplified assessments against brittle fracture, that underlie worst-case considerations, allow only significantly reduced utilisation factors for large wall thicknesses. Generally accepted concepts for the arithmetic evaluation of realistic dimensioning scenarios under consideration of the manufacturing quality of cast steel components are currently not available. In the following paper the experimental investigations for evaluating brittle fracture safety of thick-walled components and an accurate detection method on the basis of numerical calculations are presented. These results were developed in the scope of a doctoral thesis at the Research Center for Steel, Timber and Masonry at Karlsruhe Institute of Technology (KIT).