Investigation and improvement the Properties of 7075 AL/T6 Alloy using TiO₂ Nanomaterials

Aluminium based metal matrix composites had drawn most attraction because of enhanced properties in structural applications for the past two decades ; therefore fatigue and tensile properties of composite materials should be studied for their structural applications .In the present research nanoparticles TiO₂ were added with different weight percentage (1,3,5,7,and 9wt.%) and average particles size (10-20nm) to the 7075/T6 Al -alloy by stir casting technique. The results indicated that the tensile and fatigue properties increase with increasing the wt. % of TiO₂ nanoparticle. The optical micrographs of 7075 Al- alloy with 1,3,5,7,and 9wt.%) TiO₂ particles were shown uniform distribution of TiO₂ and less level of porosity of microstructure compared to 7075/T6 Al-alloy and the optimum improvement in tensile and fatigue properties is occurred at 9 wt.% of TiO₂. (paper)