About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Defect Tolerance of Cu Alloyed and Precipitation Hardened Steels with Different C Contents |
Author(s) |
David Goerzen, Hannah Schwich, Bastian Blinn, Wolfgang Bleck, Tilmann Beck |
On-Site Speaker (Planned) |
David Goerzen |
Abstract Scope |
Defect tolerance aims at reducing the negative effect of defects on fatigue strength. Previous works showed that Cu precipitates enhance the defect tolerance of steels by inducing an increased cyclic hardening potential and, thus, a higher potential to counteract local stress intensities. Based on this, it was investigated how different Cu precipitation states influence the defect tolerance of two steels with 0.005 (X0.5) and 0,21 wt.% C (X21). The defect tolerance was evaluated by the √area concept, a comparison of the fatigue lifetime, the reduction of fatigue strength at given defect size, and the Kitagawa-Takahashi diagram. These approaches show that for X0.5 a higher cyclic hardening potential, induced by precipitation hardening, correlates with a higher defect tolerance, being dependent on the precipitation state of Cu. However, the defect tolerance of X21 was not increased by Cu precipitates, which might be caused by the additional pearlitic phase present in X21. |
Proceedings Inclusion? |
Planned: |