Effects of aluminizing and combined strengthening on the fatigue property of K403 superalloy component under combined high and low cycle loading

Fatigue properties of K403 superalloy blades were tested using a combined high cycle fatigue (HCF) and low cycle fatigue (LCF) loading. Samples were tested in the as-cast, as-aluminized, and as-strengthened conditions. The strengthening treatment was wet sand blasting the blade root, followed by shot peening, and vibratory polishing. Metallographic and scanning electron microscope (SEM) fractographic examinations were conducted on the blades,...