A novel method for improving the strength and ductility of Mg-Y-Er-Zn alloy using rotary-die equal-channel angular pressing

A novel method was developed via the continuous refinement of grains to prepare an Mg-6.5Y-1.2Er-1.6Zn (wt.%) alloy with a ductility of 35% and an ultimate tensile strength of 377 MPa. It involved the use of a 32-pass equal-channel angular pressing process. The strength and ductility of the obtained magnesium alloy after the rapid processing were improved by 188.5% and 700%, respectively, compared with an as-cast alloy. These im-provements are attributed to the refined 14H-LPSO, uniform distribution of the spheroi-dized second phase, and a large number of dynamic recrystallized grains. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

A novel method was developed to prepare a high-strength and high-ductility magnesium alloy through continuous refinement of grains, resulting in significant improvements in the alloy's properties after rapid processing, mainly attributed to grain refinement, uniform distribution of the second phase, and dynamic recrystallization.