Abstract
Duplex steel, aluminum alloy, carbon fiber-reinforced composites, and other materials have become the preferred lightweight materials for automobiles. The self-piercing riveted joints of dual-phase steel DP590 and aluminum alloy AA6061 were selected for fatigue tests, and the fatigue properties of the joints were analyzed. The typical fatigue failure fractures were observed by scanning electron microscopy (SEM), and the microfailure mechanism of the joints was analyzed. The results show that the fatigue properties of self-piercing riveted joints are different with different upper substrates. The failure modes of the AA35 joints are all fractures of the lower substrates. When the upper substrate is DP590 plate under high fatigue load, the cracks are easy to initiate in the rivet area. The cracks of the other self-piercing riveted joints originate on the side of the lower plate and extend along the riveted area to the width of the substrate.
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Acknowledgments
This research is supported by the National Natural Science Foundation of China (51875201) and Key Research and Development Plan of Jiangxi Province (20192BBEL50013).
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Huang, Z., Jia, Y., Lai, J. (2021). Fatigue Characteristics and Failure Mechanism of Self-piercing Riveted Joints of DP590 and AA6061 Plates. In: Daehn, G., Cao, J., Kinsey, B., Tekkaya, E., Vivek, A., Yoshida, Y. (eds) Forming the Future. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-75381-8_118
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DOI: https://doi.org/10.1007/978-3-030-75381-8_118
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