Effect of Yttrium on the Microstructure and Mechanical Properties of A5083 Secondary Aluminum Alloy

Tijjani Abdullahi; Zawati Harun; Mohd Hafiz Dzarfan Othman; Alsaddeeq Basheer Yousuf Blaou; Awwal Hussain Nuhu; Salem Abdullah Bagaber

Authors

Tijjani Abdullahi Advanced Manufacturing and Material Center (AMMC), Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
Zawati Harun Advanced Manufacturing and Material Center (AMMC), Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
Mohd Hafiz Dzarfan Othman Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
Alsaddeeq Basheer Yousuf Blaou Advanced Manufacturing and Material Center (AMMC), Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
Awwal Hussain Nuhu Faculty of Applied Science and Technology, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia
Salem Abdullah Bagaber Faculty of Manufacturing Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia

Keywords:

Secondary aluminum, Yttrium, Microstructure, Mechanical properties

Abstract

The significant economic and environmental benefits of using secondary aluminum alloys are being challenged with the need for selection of alloying elements that is capable of producing secondary castable Al alloys that can be used on the same quality as before, to provide better strength, with stand high-temperature and good corrosion resistance. The interactive effects of Yttrium (Y) additive on the microstructure of A5083 secondary aluminum alloy and how 0.5%, 1.0%, and 1.5% of this addictive affects the mechanical properties of the secondary alloy was investigated. X-ray diffractometer and FESEM spectroscopy, coupled with an optical microscopic test were used for characterization, while the mechanical properties testing involvestensile and impact strength test. The modifications formed an intermetallic compound which causes the size of the dendritic phase to decrease along with increasing the grain size to 40 μm. The Al-Mg-1% Y alloys display greater tensile strength, Young modulus, and elongation, these enhancements were expected to improve the service integrity of the secondary A5083 aluminum, especially for structural, marine,and building construction.The impact shock absorbed by the modified alloy and the micro hardness test result also indicated that the addition of Y up to 1 wt.% gives the bestmodification to the A5083 secondary aluminum alloy.