| About this Abstract |
| Meeting |
2025 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 |
A Study on the Effect of Microstructure on pre- and Post-Punching Fatigue Properties of Hot-Rolled Thick-Plate Advanced High-Strength Steel |
| Author(s) |
Nader Heshmati, Mohammad Hoseini-Athar, Erik Olsson, Annika Borgenstam, Henrik Sieurin, Joachim Larsson, Peter Hedström |
| On-Site Speaker (Planned) |
Nader Heshmati |
| Abstract Scope |
The effect of microstructure on the pre- and post-punching fatigue properties of three advanced high-strength steels (AHSSs) is compared with a high-strength low-alloy (HSLA) steel used in heavy-duty truck chassis. Microstructure characterization, tensile testing, high cycle fatigue (HCF) testing on as-rolled and punched specimens, and fatigue crack growth rate (FCGR) testing are conducted. Microstructure-driven fatigue crack initiation and propagation mechanisms are proposed for the as-rolled condition and are further used to explain the post-punching fatigue performance of the investigated steels. It is found that post-punching HCF at high applied loads is governed by the FCGR behavior of the steel, while the fatigue limit is more dependent on microstructural changes resulting from punching. Influential parameters include differences in strain localization and residual stress after punching. These findings are promising for unlocking the potential of AHSS, enhancing their use in heavy-duty truck chassis going forward. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, |