Mechanical properties of 7075 aluminum alloy matrix / Al2O3 particles reinforced composites

• Published in: Engineering and Technology Journal Vol. 35; no. 3A; pp. 239 - 245
• Main Authors: al-Alkawi, Husayn Jasim Muhammad, Mahmud, Ibtihal Abd al-Razzaq, al-Jafari, Mamun Ali Ahmad
• Format: Journal Article
• Language: English
• Published: Baghdad, Iraq University of Technology 01-03-2017; Unviversity of Technology- Iraq
• Subjects: matrix; nanomaterial; stir casting method
• ISSN: 1681-6900; 2412-0758
• DOI: 10.30684/etj.35.3A.8

7075 Aluminum alloy metal matrix composites (MMCs) with different wt % of Al2O3. (0.2, 0.4, 0.6, 0.8, and 1), the size of reinforced particles is 10 Nano meter , were fabricated using stir casting technique. The influence of adding Al2O3 particles content on the mechanical properties of the MMCs . It was observed that the nanomaterial reinforcement led to high improvement in BHN hardness ultimate strength (Ou), yield stress (Oy) and ductility. The improvements were due to regular distribution of Al2O3 and refinement of aluminum 7075 grains. The maximum improvement in BHN hardness, Ou and Oy was observed at 0.2 wt %. Al2O3. While the minimum value of E % was obtained at 0.2 wt % Al2O3.