PSI - Issue 2_A

Goran Vukelic et al. / Procedia Structural Integrity 2 (2016) 2944–2950 Author name / Structural Integrity Procedia 00 (2016) 000 – 000

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Fig. 1. Geometry and dimensions (in mm) of considered spring.

Fig. 2 (a) shows specimens cut from fractured coil spring with the fracture surface oriented at 45º to the wire centerline, typical of torsional fatigue failure under cyclic loading. Polymer-based paint layer protects spring surface against corrosion, but wear scar damaged the protective layer around the fracture surface. Wear scar was probably result of contact between the bearing and first active coil. Spring has been exposed to corrosion at this area and heavily corroded rugose surface of the wire can be observed in Fig. 2 (b).

a)