Tailoring Nano-crystallization in Zr50Ti4Y1Al10Cu25Ni7Co2Fe1 complex multicomponent bulk metallic glass by O doping

In this paper, O was added in Zr50Ti4Y1Al10Cu25Ni7Co2Fe1 complex multicomponent bulk metallic glass (CMBMG) with concentrations of 0.12 at.% and 0.45 at.%, and the microstructure, thermal stability and mechanical properties of these O-containing alloys were investigated in detail. It is found that, O element promotes the formation and growth of nanocrystals in the glassy matrix, and the structure of nanocrystalline phase changes from BCC to FCC with the increase in O content. Moreover, even at high Oxygen concentration, the alloy still shows excellent resistance to O-induced brittleness. This work is beneficial for better understanding the correlation between O and nanocrystal formation in CMBMGs, which provides a novel insight for further development of this series of alloys.

Automated summary

This study investigated the effects of adding Oxygen to Zr50Ti4Y1Al10Cu25Ni7Co2Fe1 complex multicomponent bulk metallic glass on its microstructure, thermal stability, and mechanical properties. It was found that Oxygen promoted the formation and growth of nanocrystals, leading to a change in the structure of the nanocrystalline phase. Interestingly, even at high Oxygen concentrations, the alloy still exhibited excellent resistance to Oxygen-induced brittleness.