PSI - Issue 33

Jesús Toribio et al. / Procedia Structural Integrity 33 (2021) 1219–1224 Jesús Toribio / Porcedia Structural Integrity 00 (2021) 000–000

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Axisymmetric notched samples were used. The notch geometries are showed in Fig. 1. Each one of the notches where machined in the different wires keeping constant the ratios C/D & R/D for all plastic strain degree, being C the notch depth, R the notch radius and D the nominal diameter of the steel.

D

A

B

C

Fig. 1. Scheme of axisymmetric notched samples with notched geometries A, B, C and D.

Each one of the notched samples was tested till fracture by means of a tension test in axial direction. In this paper the study is focussed in the most heavily drawn pearlitic steels with markedly anisotropic fracture. These steels show a fracture surface contained in planes clearly different to that which contains the wire net section (Figs. 2 & 3).

Fig. 2. Sample 6A: anisotropic fracture behaviour: front view (left) and side view (right).

Fig. 3. Sample 5B: anisotropic fracture behaviour –front view (left) and side view (right).