Impacts of Nano Particles on Fatigue Strength of Aluminum Based Metal Matrix Composites for Aerospace

Nanotechnology is spreading massively in the different demanding fields of engineering and medicines like defence, aerospace, automobiles, electronics, information and communication technology. This present research article deals with study of dual Nano sized particles reinforcement impacts on the fatigue life of AA7075-T651 grade aluminum alloy based Metal Matrix Nanocomposites (MMNCs) which is produced by emerging stir casting process. Nano particles are effectively enhancing the mechanical properties in the metal matrix composite than micron level particles because of its bonding nature. So for, the Nanoparticles were reinforced at three different volume fractions in parent metal such as Nano SiC 5%, 10% and 15% with constant Nano Al2O3 of 5% to produce the Nanocomposites. Fatigue behavior has become progressively more established as technology and it has developed a larger amount of equipment such as aircrafts, compressors, pumps, gas pipelines, oil tanks, pistons, turbines and many more subject to repeated loading and vibration. Therefore, in this investigation, the fatigue life of the produced MMNCs were investigated by advanced rotating beam fatigue testing machine to understand the impacts of reinforced Nano particles and the integrity of the MMNCs were examined by Optical Microcopy (OM) and Scanning Electron Microscopy (SEM). (C) 2016 Elsevier Ltd. All rights reserved.