Effect of Imperfections on Conductivity and Hardness of High-Zn X7xxx Cast Al-Alloys Produced from Recycled Beverage Can

  • Abubakar Kazeem Department of Science Policy and Innovation Studies, National Centre for Technology Management (NACETEM), North Central Zonal Office, FCT-Abuja, NIGERIA
  • Amkpa Job Ajala Department of Foundry Engineering, Federal Polytechnic Idah, PMB 1037 Idah, Kogi State, NIGERIA
  • Nur Azam Badarulzaman Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), 86400 Parit Raja, Johor, MALAYSIA
  • Wan Fahmin Faiz Wan Ali Faculty of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), 81310, UTM-Skudai, Johor, MALAYSIA
Keywords: Recycled Beverage can, Imperfections, experimental alloy, conductivity, high-Zn

Abstract

In this paper, the effect of imperfections on electrical and macro hardness property of a novel experimental high-Zn Al-Zn-Mg-Cu alloys produced from recycled beverage can was investigated with the aim of correlating hardness with conductivity using ANOVA. Alloys were observed in the as cast (AC), annealed (O), natural aged (T4) and artificial aged (T6) conditions. Heat treatments supported the formation of hardening precipitates like the Al2.06Fe4, α-AlFeSi, Al7Cu2Fe, θ(Al2Cu), β-AlFeSi and  MgZn2 phases. Imperfections inform of voids and contaminants are by-products of recycled aluminium and casting route. Peak obtainable hardness of 122.94 Hv in the T6 condition was observed in an alloy of Al-5.0 Zn-1.5 Mg- 0.35 Cu. The same alloy’s conductivity is 3.676 ´ 107 S/m. The least hardness of 38.16 Hv and conductivity of 3.533 ´ 107 S/m is credited to an alloy of Al- 5.0 Zn-1.00 Mg-0.35 Cu in the O condition. The relationship between hardness and conductivity is nonlinear. Models developed to predict the hardness of this experimental alloys fits all the variables and covers the AC, O, T4 and T6 respectively. The need for further investigation on the imperfections, optimization of mechanical properties and additional mechanical properties investigation is required.

Downloads

Download data is not yet available.

Author Biographies

Abubakar Kazeem, Department of Science Policy and Innovation Studies, National Centre for Technology Management (NACETEM), North Central Zonal Office, FCT-Abuja, NIGERIA
PhD Student
Amkpa Job Ajala, Department of Foundry Engineering, Federal Polytechnic Idah, PMB 1037 Idah, Kogi State, NIGERIA
Academician
Nur Azam Badarulzaman, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), 86400 Parit Raja, Johor, MALAYSIA
Academician
Wan Fahmin Faiz Wan Ali, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), 81310, UTM-Skudai, Johor, MALAYSIA
Academician
Published
03-02-2020
How to Cite
Kazeem, A., Ajala, A. J., Badarulzaman, N. A., & Wan Ali, W. F. F. (2020). Effect of Imperfections on Conductivity and Hardness of High-Zn X7xxx Cast Al-Alloys Produced from Recycled Beverage Can. International Journal of Integrated Engineering, 12(1), 188-194. Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4349
Section
Articles