Effect of Gd and Y on the Low Cycle Fatigue Properties of AZ91D-0.4Ca-0.3Sr
The properties of gravity casting AZ91D-0.4Ca-0.3Sr alloy with Gd and Y in metal mould were studied by controlling the total strain amplitude ranged from 0.05mm to 0.25mm.under the conditions of the stress of ratio R equal to –1. In addition, the microstructure, phases, chemical constitute, fracture and low cycle fatigue behaviors of the magnesium alloy were primarily researched by means of SEM, EDAX and XRD and so on. The results showed that 3.0wt%Gd and 3.0wt%Y introduced the AZ91D-0.4Ca-0.3Sr alloy can refine α-Mg, and that Gd cooperating with Y can significantly improve the low cycle fatigue life. The low cycle fatigue times can be up to approximately 9874.
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Y. C. Zhu et al., "Effect of Gd and Y on the Low Cycle Fatigue Properties of AZ91D-0.4Ca-0.3Sr", Advanced Materials Research, Vols. 197-198, pp. 1536-1539, 2011