الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 78 |  |  |
| | | from | 78 | | |
Abstract
Metal casting is one of the most familiar processes. It is employed in a wide range of industrial fields. One of the materials that are most frequently used in metal casting is aluminium. This study’s primary goal is to use functionally graded materials to enhance the mechanical properties of aluminium alloys. The goal of this research is to fabricate functionally graded materials (FGMs) by applying a spur gear model in a specific way to produce a gradient. In this work, an aluminium alloy 2024 with Al2O3 reinforcement particles with 60 µm grain size was created at a speed of 1300 rpm in a vertical centrifugal casting machine to create a functionally graded material (FGM). Different weight percentages were used for the reinforcement, including 0, 2, 5, and 10 wt.%. The main casting design, necessary qualities, economic considerations, and availability influence alloy selection for metal casting applications. The die was created with stainless steel W302. Centrifugal casting was used to perform the pouring. Metal matrix composites’ sliding wear behaviour was studied using a Pin on the Disc test. Throughout the wear test, the disc speed was maintained at 200 rpm with a load of 30 N at room temperature 900 sec. The counter body, or disc, is constructed of AISI 52100 steel. All specimens have been produced in accordance with ASTM G99 criteria for wear testing. The weight loss strategy has been applied to the results of established wear tests throughout the outward to the inward direction of the gear’s cast teeth. Each sample was put through tests to determine which had greater mechanical qualities. The tests included the pin-on-disc wear test, in which the wear rate for each sample was calculated, this test was carried out at the Mechanical Test Lab, Faculty of Engineering, Mansoura University and the Vickers hardness test which was done at Metallurgy Lab, Faculty of Engineering, Mansoura University. Chemical composition and microstructure for each sample were checked using an SEM material microscope and an EDS analysis, these tests were carried out at the microscopic examination unit, Faculty of Agriculture, Mansoura University. The results indicated that the gradient of Al2O3 in the alloy plays an affected role in the mechanical properties of the spur gear samples this will be discussed in the following chapters.