COMPOCASTING PROCESS PDF
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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Specific wear rate prediction was done using artificial neural network ANN.
The results are divided in two groups. Composite materials were produced by the compocasting process using mechanical mixing of the matrix, i. A side by side investigation of the microstructure and hardness of the composite and the base alloy A regression analysis and experiment corroboration was conducted in order to verify the results of the optimization.
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The analysis has shown the presence of MML, which means that there was transfer of material from steel disc to composite block. A aluminium alloy is used as a base matrix alloy, 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. The testing included sliding speeds of 0. The mechanical properties of the composite are improved in relation to the base alloy.
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. Hybrid composites are obtained by compo casting procedure.
Sliding distance of m was constant. The goal of the paper was to optimize the influencing parameters in order to minimize specific wear rate using the Taguchi method. MMCs based on hypoeutectic Al-Si alloy: 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. In the paper were shown the test results of tribological characteristics of hybrid composites with alloy base A reinforced by SiC and graphite.
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.
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In this paper, the basic characteristics microstructure and hardness and tribological properties of 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. A cokpocasting by side investigation of the microstructure and hardness of the composite and the base alloy cast into a steel mould was done.
These samples were additionally pressed in a special tooling by which tensile test samples were obtained. This paper presents a short summary of peocess researches conducted in past few years concerning the MMCs with A Al-Si alloy matrix and different second phase. 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.
Tribological tests were performed on a block-on-disc tribometer without lubrication. One of the possible solutions for overcoming of poor Al-alloys tribological properties is using of different types of metal matrix composites MMCs. The main parameter analyzed in the paper is coefficient of friction obtained orocess the conditions with and without lubrication.
In the first group are the results that The analysis showed that the sliding speed has the greatest influence on specific wear cmpocasting Tribological tests are realized Skip to main content. Ads help cover our server costs.
Click here to sign up. Tribological behavior of aluminum hybrid composites studied pricess application of factorial techniques. The composites were produced by compo casting technique and then subjected to the thermal treatment T4 regime. Enter the email address you signed up with and we’ll email you a reset link.
Compocasting Research Papers –
Corrosion processes have occurred in the composite matrix. Help Center Find new research papers in: Tribological properties in dry sliding conditions. 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 Tribological tests are realized on tribometer with block on disc compact pair in Tribological Center of Faculty of Engineering in Kragujevac.
Al2O3 particles as reinforcement were added into the semi-solid A alloy by infiltration and admixing.
Corrosion did not affect SiC particles in the composites. 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. Application of the compocasting process led to a transformation of a dendritic to a nondendritic structure of the base alloy.
It was found that corrosion resistance of the composites decreased with increase in content of SiC particles.