Shot peening effect on fatigue life of EN GJS 600-3 grade ductile iron wheel hubs

Abstract

Abstract Durability of wheel hubs is limited by their fatigue failure. Wheel hubs are mostly manufactured by casting process using ductile iron, and their fatigue strength can be improved by shot peening, which induces compressive stresses at their surfaces. In this study, fatigue life of wheel hubs manufactured from grade EN GJS 600-3 iron was studied. Shot-peened and untreated wheel hubs were subjected to fatigue test with the number of loading cycles up to 1 million. The test results showed that all untreated wheel hubs failed the test, while all shot-peened ones passed the 1 million cycle’s milestone. This study proved that fatigue life of wheel hubs manufactured from grade EN GJS 600-3 iron was improved almost by 100 percent via shot peening.