EFFECT OF DYSPROSIUM ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Al5083

Abstract

Aluminium has been widely used in engineering industry because of their excellent properties. Aluminum 5083 alloys are Al-mg alloys that have major applications in marine industry due to their excellent corrosion resistant and high strength. Various research has been carried out to increase its properties and in this research micro-alloying method by adding dysprosium, in Al5083 is employed. The melting was performed using crucible in induction furnace for different concentration of Dy 0wt%, 0.25wt%, 0.50wt% and 0.75wt%. The cast is cut and grinded using SiC from grids of 320 to 1200 followed by polishing in Silica Struer solution to achieved mirror surface finished before examined by optical microscope and scanning electron microscope. Additions of Dy promote the formation of Al structure and fine grain size. Mechanical properties of Al5083 have been determined by three different testing which are compression test, hardness test and impact test. Results show that addition of Dy increase the strength, impact properties and hardness of Al5083 alloy through the improved microstructures.