Anisotropic Fatigue amp; Fracture Behaviour in Hot-Rolled and Cold-Drawn Pearlitic Steel Wires

Publisher: Trans Tech Publications

E-ISSN: 1662-9795|2016|713|103-106

ISSN: 1013-9826

Source: Key Engineering Materials, Vol.2016, Iss.713, 2016-11, pp. : 103-106

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Abstract

This paper analyses the role of cold drawing in the fatigue and fracture behaviour of pearlitic steels with distinct drawing degree (a hot rolled bar and a commercial prestressing steel wire). Fatigue crack growth develops globally in mode I and locally in mixed mode in both steels, the micro-crack deflection angle depending on the drawing degree. With regard to fracture behaviour, it takes place in mode I in the hot-rolled bar and in mixed mode (with a strong component of mode II) in the case of the cold-drawn wire, so that strength anisotropy appears in the drawn steel and a sort of directional toughness can be defined.