An Estimation Study on Fatigue transition Life of Nanocomposites Reinforced by AL2O3

Hussain Jasim Mohammed; Ibtihal A. Mahmood; Mamoon A. A. Al- Jaafari

Hussain Jasim Mohammed Electromechanical Engineering Department, University of Technology, Iraq
Ibtihal A. Mahmood Mechanical Engineering Department, University of Technology, Iraq
Mamoon A. A. Al- Jaafari Mechanical Engineering Department, University of Al-Mustansiriya, Iraq

Keywords: 2024Al/Al2O3 nanocomposite, nanoparticles, Al2O3, constant fatigue test

Abstract

The behaviors of 2024Al/Al₂O₃nanocomposite which wes fabricated by stir casting at 450r.p.m and casting temperature of 850^oC have been examined under four points loading of rotating bending. fatigue test at room temperature (RT), humidity of 40% and fully revers stress ratio (R=-1).The trend of the fatigue properties obtained from the experimental tests showed an improvement in the fatigue strength and life compared to the metal matrix 2024Al alloy. The S-N curves were obtained and the equations of the nanocomposite which described the constant S-N curves were established based on Basquin power law equation for 0.2, 0.4, 0.6, 0.8 and 1.0wt. % Al₂O₃. The experimental results analysis revealed that the fatigue strength of nanocomposite are improved by 0.53%, and the fatigue transition life is increased by 16.02% compared to the metal matrix.