Fatigue Resistance of Self-hardening Aluminium Cast Alloy

Self-hardening Al-alloys (Al-Zn-Si-Mg alloys) introduce an innovative class of light Al-alloys. Fatigue properties of AlZn10Si8Mg cast alloy in the high cycle region were tested by rotating bending fatigue loading in a high cycle region with the used of parameters - frequency f = 40 Hz, temperature T = 20 ± 5 °C and stress ratio R = -1. Because of that large pores are near or at specimeńs surface and its dominant reason of fatigue crack initiation and propagation.