Investigation of fatigue behaviors of traditional and waste reinforced metal matrix composites

In this study, a16061 alloy as a matrix material, SIC and AI203 ceramics which are frequently used in the automotive industry from traditional reinforced elements and marble dust obtained by powdering marble pieces collected from waste areas of Afyon region opium marble production enterprises as waste reinforcement material are used. Besides single composites, Dual and triple hybrid composites were produced by using traditional and waste reinforced materials. powders with a powder size of 22-59 μm which will be used in our study were obtained by carrying out sieve analysis of the marble powder , SIC and AI2O3 powders with a powder size of 22-59 μm were also supplied from the market. Single composites and hybrid composites were produced using the two-ply mixing casting process, which is a liquid casting process. In this method, the alloy A16061 is first heated to 700 ° C, then the temperature of the alloy is reduced to 600 ° C, and preheated to 250 ° C Reinforcement elements are added to the alloy, which is semi-solid at this temperature, is heated and mixed with hand. The alloy was then superheated and the temperature of the alloy increased to 800 ° C and at this temperature, At speed 250 rpm, the alloy was mechanically mixed for 10 minutes. Nitrogen was used as an inert gas during the mixing process and the oxygen in the environment was removed. Composites were then produced by casting metal molds with a length of 300 mm and a diameter of 14 mm. The microstructures of the produced composites were examined by scanning electron microscope, EDS analysis were obtained, The prototype quantities were calculated by Archimedes principle and hardnesses were determined by Brinell hardness measurement method. For the fatigue strengths of the composites produced, 9 different stress value were measured until the samples were broken off by using the rotary curvature fatigue device. Three samples were produced from each sample and the prototype quantities and brinell hardness values were determined. Thus The reliability of the measurements is increased. The marble dust we used as reinforcements in the production of single and double composite and triple hybrid composites has increased the fatigue strength of A16061 to 11% by weight of reinforcement. In the prototype measurements, it was determined that the single composite materials reinforced with marble slurry had more prototypes than the SIC and Al2O3 reinforcements. It was observed that as the weight ratio of the reinforcement material added to the matrix increases, the prototype value increases with it. It has been determined that the hardness of composites increases with the weight ratio of the compound added in the hardness tests and that the marble powder is almost as effective as SIC and Al2O3 in increasing the hardness value of the composite.