Effect of Yttrium, Holmium and Zirconium on Microstructure and Mechanical Properties of Aluminium LM30 Alloy

Abstract

The application of aluminium alloy in automotive and aerospace industries has supported the need to study the effect of rare earth elements on aluminium alloys. In this study, the effect of the rare earth element Yttrium (Y), Holmium (Ho) and Zirconium (Zr) on the microstructure and mechanical properties of the Aluminium alloy was reviewed. The case study method was conducted by referring from previous researches and journal articles. In the selected references, from the experiments that were conducted using optical microscopy (OM), scanning electron microscopy coupled with electron dispersive spectroscopy, Tensile test and Vickers Hardness test showed that the addition of Yttrium and Holmium in different amounts improved the grain size, Ultimate Tensile Strength and hardness value of the aluminium alloys. Both additives improved the microstructure and mechanical properties of aluminium alloys but different types of aluminium alloys have different compositions which makes the optimum weight percentage of yttrium holmium and zirconium addition to differ too.