Abstract
DP980 and QP980 steels are chosen to evaluate their properties of welded spot under high-cycle shear fatigue test. Samples are analyzed by OM and SEM after fatigue test. It was observed that QP980 steel has a better performance of anti-high-cycle fatigue fracture at the same welding parameters. Both fatigue cracks of two kinds of welded spot initiate from the end of pre-cracks between two base materials, and better anti-high-cycle fatigue performance of spot-welded QP980 are found due to higher initiation difficulty of fatigue cracks which has some connections with higher hardness of martensite in this area.
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Ding, Z. et al. (2019). Study on High-Cycle Shear Fatigue Behavior of Two Kinds of Spot-Welded 980 Mpa Ultra-High-Strength Steels. In: (SAE-China), S. (eds) Proceedings of the 19th Asia Pacific Automotive Engineering Conference & SAE-China Congress 2017: Selected Papers. SAE-China 2017. Lecture Notes in Electrical Engineering, vol 486. Springer, Singapore. https://doi.org/10.1007/978-981-10-8506-2_69
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DOI: https://doi.org/10.1007/978-981-10-8506-2_69
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