Compocasting (semisolid-semisolid, SS) and its two variations: SL (semisolid- liquid) and LL (liquid-liquid) process routes are used to make Al reinforced. SUMMARY: Al18B4O33 particle and whisker reinforced magnesium alloy ( AZ91D and. ZK60) composites were fabricated by the compocasting. Compo-casting is a type of stir casting method where the metal is heated to semi- solid state instead of liquid state.
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The analysis showed that the sliding speed has the greatest influence on specific wear rate MMCs based on hypoeutectic Al-Si alloy: By the experimental plan, test is conducted under three different values of sliding speed, three different values of normal load, different sliding distances, and also different lubricants.
The results are divided in two groups. Proceess tests are realized Skip to main content. Microstructural examinations were performed after day exposure of thermally treated composites in the sodium-chloride solution. The composites were obtained by a modified compocasting procedure. procexs
Corrosion processes have occurred in the composite matrix. Ads help cover our server costs. In the first group are the results that concern the influences of amount and size of reinforcement Al2O3and in the second group are the results that concern the influences of type of reinforcement Al2O3 and SiC and graphite.
This article analyzes the influence of graphite reinforcement, load, sliding speed, and sliding distance on tribological behavior of A aluminum matrix composites reinforced with silicon carbide and graphite using the full-factorial design.
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Hybrid composite specimen is obtained by compocasting procedure. Tribological test results showed that, for the investigated conditions, both composites had improved wear resistance and similar coefficient of friction with the reference material gray cast iron.
In the first group are the results that The mechanical properties of the composite are improved in relation to the base alloy. Tribological tests are realized on tribometer with block on disc compact pair in Tribological Center of Faculty of Engineering in Kragujevac.
The goal of the paper was to optimize the influencing parameters in order to minimize specific wear rate using the Taguchi method.
Tribological testing have been conducted on a block-on-disc tribometer with three varying loads 10, 20 and 30 N and three sliding speeds 0. Specific wear rate prediction was done using artificial neural network ANN. The analysis has shown the presence of MML, which means that there was transfer of material from steel disc to composite block. Help Center Find new research papers in: Tribological behavior of aluminum hybrid composites studied by application of factorial techniques.
A regression analysis and experiment corroboration was conducted in order to compocazting the results of the optimization. It was found that corrosion resistance of the composites decreased with increase in content of SiC particles. The composites were produced by compo casting technique and then subjected to the thermal treatment T4 regime. A aluminium alloy is used as a base matrix alloy, Tribological tests were performed on a block-on-disc tribometer without lubrication.
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Hybrid composites are obtained by compo casting procese. The effects of load, sliding speed, weight percentage of graphite reinforcement, and sliding distance on the wear rate are The testing included sliding speeds of 0. A side by side investigation of the microstructure and hardness of the composite and the base alloy cast into a steel mould was done. Sliding distance of m was constant.
Using of Al-alloys for producing of engine cylinders and blocks, instead of gray cast iron, results with weight savings and lower fuel consumption and therefore reduced pollution. Composite materials were produced by the compocasting process using mechanical mixing of the matrix, i.
One of the possible solutions for overcoming of poor Tribological properties in dry sliding conditions. In this paper, the basic characteristics microstructure and hardness and tribological properties compofasting two A Al-Si alloy base MMCs, reinforced with Al2O3 particles were analysed and compared with gray cast iron as a standard material for cylinder blocks. Log In Sign Up.
Compocasting Research Papers –
This paper presents a short summary of the researches conducted in past few years concerning the MMCs with A Al-Si alloy matrix and different second phase. Composite are obtained using the compocasting procedure. Application of the compocasting process led to a transformation peocess a dendritic to a nondendritic structure of the base alloy. Remember compofasting on this computer. These samples were additionally pressed in a special tooling by which tensile test samples were obtained.
The main parameter analyzed in the paper is coefficient of friction obtained in the conditions with and without lubrication. This article analyzes the influence of graphite reinforcement, load, sliding speed, and sliding distance on tribological behavior of A aluminum matrix composites reinforced with silicon carbide and graphite using the full-factorial In the proecss were shown the test results of tribological characteristics of hybrid composites with alloy base A reinforced by SiC and graphite.
A side by prrocess investigation of the microstructure and hardness of the composite and the base alloy Al2O3 particles as reinforcement were added into the semi-solid A alloy by infiltration and admixing. One of the possible solutions for overcoming of poor Al-alloys tribological properties is using of different types compoacsting metal matrix composites MMCs.
The tests were done for different normal load values, sliding speeds, sliding distance, with and without lubrication. The local progress of corrosion in depth of the composite matrix was noticed in micro-cracks.