Fatigue strength study based on geometric shape of bulk defects in cast steel

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Organisational units

External Organisational units

  • Christian Doppler Laboratory for Manufacturing Process Based Component Design

Abstract

This work applies Taylor’s Theory of Critical Distances (TCD) to assess the fatigue strength of defect-afflicted cast steel components made of G21Mn5+N. Based on radiographs of complexly shaped spatial imperfections, the established TCD-framework leads to a sound agreement of numerical and experimental fatigue strength. Moreover, a novel fatigue assessment methodology is presented, which bases on the projected planar defect shape, featuring an engineering-feasible design method without the need of extensive numerical simulations. About one-hundred additional imperfections referring to ASTM E446 class A and C validate the model, showing an average deviation of about five percent in fatigue strength.

Details

Original languageEnglish
Article number107082
Number of pages9
JournalInternational Journal of Fatigue
Volume163.2022
Issue numberOctober
DOIs
Publication statusE-pub ahead of print - 18 Jun 2022