Abstract
In this research paper we evaluate the potential of an ultra-high-strength steel for use in cyclically loaded, inner-pressure bearing components. Component-like specimens with intersecting boreholes were subjected to different grades of autofrettage pressure. The study investigates the material behaviour and describes it using a simple approach. Numerical analysis is conducted to determine the effects of autofrettage on endurance limits, crack arrest occurrences and the length of arrested cracks. The numerical results are compared to results from component-like specimen testing and the overall calculation procedure is found to be accurate. This research provides valuable insights into using ultra-high-strength steel for such applications.
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