Nanostructural Control by Additive Pd in Cast Zr_(50)Cu_(40)Al_(10) Glassy Alloys with Good Fatigue Properties

摘要

Relative value of free volume can be estimated by density measurement of bulk glassy alloys (BGAs) with the same shape. A Woehler curve of Zr_(50)Cu_(40)Al_(10) BGAs indicates two drawbacks, one is low fatigue limit and another is significant decrease in fatigue strength in the cycle range of 10~3 to 10~4. However, these drawbacks can be improved by addition of Pd element, which can promote excess free volume and nano-network structure formation. Therefore, the Zr_(50)Cu_(37)Al_(10)Pd_3 BGA indicates a significant increase of fatigue limit over 1 GPa.