A new hexagonal AlZnY phase and the nano-hardness in Mg-Y-Al-Zn alloy

The composition of the phases in the Mg-Y-Al-Zn system is still ambiguous mainly because the elemental compositions of these phases are tested without studying the corresponding crystal structures. In the present work, a new hexagonal phase AlZnY (a = b = 8.9443 angstrom, c = 7.2111 angstrom, and alpha = beta = 90 degrees gamma = 120 degrees) was observed in the Mg-4Y-Al-3Zn alloy for the first time. The deformation behavior of the AlZnY phase was evaluated, the results show that it is a brittle phase with a hardness of 2.04-2.21 GPa. This study provides new data for the knowledge base of the Mg-Y-Al-Zn alloy system.

Automated summary

A new hexagonal phase AlZnY was discovered in the Mg-4Y-Al-3Zn alloy for the first time in this study, and its deformation behavior and hardness were evaluated, providing new data for the study of the Mg-Y-Al-Zn alloy system.