Abstract
In this work, Zn-1.5Cu-1.0Ag-xZr (x = 0, 0.1, 0.5, 1.0) alloys were used as raw materials to research the effects of Zr content and hot rolling on the microstructure and mechanical properties of the alloys. The results revealed that as-cast Zn-1.5Cu-1.0Ag alloy was composed of eta-Zn phase and (Ag, Cu) Zn4 phase. After Zr addition, Zn22Zr was precipitated in both as-cast and as-rolled Zn-1.5Cu-1.0Ag-xZr alloys, and a new phase of CuZn5 was observed in as-rolled Zn-1.5Cu-1.0Ag-xZr alloys, resulting in the second phase strengthening. It was demonstrated that the grain sizes of the as-rolled alloys were much smaller than those of as-cast alloys, while Zr had slight effects on the grain sizes. In addition, Zn-1.5Cu-1.0Ag-0.1Zr alloy has the best as cast and as-rolled mechanical properties, and the yield strength, ultimate tensile strength and elongation of above two alloys are 84.18 +/- 0.71 MPa, 117.79 +/- 0.52 MPa, 3.73 +/- 0.40% and 218.14 +/- 0.04 MPa, 244.83 +/- 0.57 MPa, 64.50 +/- 4.60%, respectively. Moreover, the strength and elongation of both as-cast and as-rolled Zn-1.5Cu-1.0Ag-xZr alloys increase initially and then decline with the increase of Zr content. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier