Processing mechanical and tribological behaviour of mg 4zn 2sr alloy with varying zr addition

Abstract

Magnesium alloy research in the past two decades has further newlineshown that magnesium can be designed to improve its strength by alloying newlinewith other metals. However, the mechanical properties and corrosion behavior newlineof high temperature are restricted. In the forthcoming era, it is imperative to newlinehave lightweight applications for electric vehicles, and magnesium possesses newlinethe potential to fulfill this prerequisite. The emerging trends in electric newlinevehicles call for a structure that is lightweight. The current work focuses on newlineimproving the mechanical and tribological properties of Mg-4Zn-2Sr-xZr newline(x=0, 0.5, 1.0, 1.5, and 2.0 wt. %) alloys by grain refinement. newlineThe microstructure reveals the presence of precipitate and grain newlinestructure reveals that the increase in Zr addition, more nucleation sites were newlinegenerated and several faceted growths co-occurred during solidification in newlinewhich the grain refinement was observed from 110 µm to 25 µm. The newlineoptimum grain refinement was obtained at 1.5% Zr addition. The X-ray newlineDiffractometer analysis revealed the presence of Mg phases. The scanning newlineelectron micrographs with EDX point and mapping results indicate the newlinepresence of Mg, Zn and Sr elements. Vickers hardness analyzer was used newlineprecisely to determine the Mg-4Zn-2Sr-xZr alloy s hardness. The Mg-4Zn newline2Sr-2Zr alloy achieved the highest possible level of hardness of 72 Hv newlinebecause of the grain refinement. newline