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The aim of this work is to analyze and compare two anodized components: a cast A356 T6 alloy produced by an SLC technique and an extruded A6061 T6 alloy. The corrosion mechanisms of anodized specimens are studied by electrochemical test, salt spray test and optical and scanning electron microscopy. The mechanical properties and corrosion resistance of the two alloys are compared and the viability of the SLC components as an alternative to extruded alloys for marine applications is discussed. 7 2 2 0 5 Int J Mater Form (2008) Suppl 1:993-996

This work is a contribution to improve understanding about the behaviour of components produced by semi-solid processes. The present study shows the effect of different conformation parameters on automotive cranking cover production obtained by Semi-Solid Rheocasting Process (SSR®). The components were produced using EN AC-46500 alloy, by an industrial plant with a 700 Ton HPDC machine and an IDRA SSR Station.The process parameters studied were slurry temperature, agitation time, speed injection and lubrication system. The characterization was carried out by microstructural analysis, X-rays and mechanical tests. The components show good mechanical properties, similar to those obtained by die cast. The process was simulated using the PROCAST program.

The aim of this study was to investigate the hard decorative anodizing components of A357 aluminium alloy, obtained in semisolid state by Sub Liquidus Casting® process, to improve its tribological properties and corrosion resistance.Components were heat treated in order to modify the shape and distribution of the eutectic silicon phase. The influence of shot peening pre-treatment on anodizing process was evaluated. Surface modifications were investigated as they might have beneficial effects on the wear and corrosion behaviour. Furthermore, the influence of surface condition on the anodization colouring behaviour of aluminium was studied.The microstructure and the surface finish influence on the anodic oxide film growth were studied by optical and scanning electron microscopy. Experiments using a tribometer (ball on disc configuration) were performed in order to evaluate the tribological properties of the material. Salt spray corrosion tests were used to study the corrosion properties before and after the anodizing process.

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The goal of this investigation was to determine the usefulness of CrC-NiCr coatings in order to improve wear resistance of tools made from hot work steels. CrC-NiCr powders were sprayed using the high velocity oxy fuel thermal spray process (HVOF) to form coatings on steel substrates approximately 150 µm thick. Coatings were heattreated in a range of temperatures between 900 and 1100 °C. The coatings were then evaluated in the as sprayed and heat treated conditions. Inspections by SEM and phase analysis by XRD were carried out. The microindentation technique was applied to measure the variation of the coatings' hardness. Experiments using a tribometer (ball on disc configuration) at room temperature and dry conditions were performed in order to evaluate the friction and wear properties of the coatings. The mechanical properties and wear behaviour of the coatings were correlated with the coating integrity and microstructure.