Abstract
The high resistance to yielding of micro-alloyed HSLA steels (high strength low alloy) and their low cost, make attractive to use them to substitute spring steels, in applications where high strainings are required.
In the present paper it is evaluated the practicability of using Nb-alloyed HSLA laminates in the manufacturing of flat springs subjected to elevated cycles of straining.
The microstructural factors, influencing the fatigue resistance, are consequently analysed. It was find out that the strong anisotropy of the microstructure (caused by the distortion of ferritic grains during the rolling process), in presence of an high content of inclusion, influences the fatigue resistance. This was found to change strongly with the direction relative to the direction of lamination. The tests conducted demonstrated that the use is possible, but the inclusion content must be checked. Furthermore the greatest stress must be oriented transversally respect to the direction of lamination.
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© 1999 Springer-Verlag Wien
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Dabalà, M., Vedovato, G., Magrini, M. (1999). Influence of Microstructural Factors on Fatigue Behaviour in Hsla Steel Laminates. In: Kuljanic, E. (eds) AMST ’99. International Centre for Mechanical Sciences, vol 406. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2508-3_46
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DOI: https://doi.org/10.1007/978-3-7091-2508-3_46
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-83148-9
Online ISBN: 978-3-7091-2508-3
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