Microstructures and tensile properties of as-cast Mg-5Sn-1Si magnesium alloy modified with trace elements of Y, Bi, Sb and Sr

Abstract

As the lightest metallic engineering materials, magnesium alloys have received a great attention in recent years due to their several advantages such as high strength-to-weight ratio, high thermal conductivity, high dimensional stability, good electromagnetic shielding characteristics, high damping capacity and good machineability [1-3]. However, commercial cast magnesium alloys such as AZ and AM alloys are limited in some applications because of their poor creep resistances and mechanical properties at elevated temperatures over 120 °C. This is caused by the lowmelting-point of Mg 17 Al 12 phase which precipitates at grain boundaries during solidification [4-6]. Hence, in the last decade, improving elevated temperature properties of magnesium alloys has become a critical issue. In order

(Y, Gd)H2 phase formation in as-cast Mg-6Gd-3Y-0.5Zr alloy

“…This particle can be indexed as (Y, Gd)H 2 phase according to the EDS and SAED analyses. It is known that Gd and Y elements belong to hcp crystal structure and have good alloying capability [20] . The solid solubility of Gd in magnesium is greater than that of Y [21] .…”

Effect of Zn Addition on the Microstructure, Mechanical Properties, and Fracture Behavior of As-Cast Mg-Gd-Y-Zr Alloys

“…At present, energy and environmental issues have become a worldwide focus; the implementation of a lightweight design has been suggested as an effective way to minimize these issues. Because of its low density and high strength ratio, magnesium alloys have broad application prospects in the fields of automobile, electronics, aerospace, and national defense [ 1 , 2 , 3 , 4 ]. Compared with medium strength aluminum alloys, commercial AZ31, ZK60, and AZ80 magnesium alloys possess a low strength and poor thermal stability, which limit their widespread application.…”