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railway axles

S. Beretta's picture

Research assistant and PhD position at PoliMi on corrosion-fatigue

Raiway axle failures have been the starting point for the studies on fatigue. However, recent accidents and papers (see [1] by Hoddinott) have shown that corrosion-fatigue plays a significant role.

At PoliMi we have recently investigated this topic finding interesting results by corrosion-fatigue tests on small-scale specimens and, recently, a validation of the model by full-scale corrosion-fatigue tests (see papers [2-3]).

S. Beretta's picture

Full-scale axle tested under corrosion-fatigue

A typical failure of a full-scale axle specimen subjected to corrosion-fatigue (rotating-bending in presence of artificial rainwater) for an axle of A1T subjected to 10^7 cycles at 160 MPa. The main crack is accompanied by the presence of many small cracks.

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