International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Comparative experimental studies of the mechanical characteristics of polycrystalline aluminum alloy AMg6 and nanocomposite  based on it n-AMg6/C60 during tension tests, as well as the effect of strain hardening on these characteristics during multi—cycle loadingunloading processes up to the destruction of the sample, are presented. The limits of strength and ductility, as well as the hardness and, by ultrasonic method, all independent second order elastic coefficients were measured.

The intensive development of turbochargers power at the end of the decade and two years after the announcement of the latest results of this development, “Breakthrough: Nitrogen Oxides (NOx) 10 times below the predicted for 2020 limits” still there is no data for the rehabilitation of the contemporary diesel engine. The progress made by the multiplication of turbochargers in bi-turbo, three-turbo and four-storied turbo has been underestimated and neglected in the shadow of the publicity for electric, hybrid and gasoline vehicles. The article offers progressive technical solutions for casting of aluminum crankcase for turbochargers of new generation through the rational use of 3D printed sand molds. The research and application in the foundry of new 3D printer technologies gives the opportunity to realize casting with new and additional functions due to their complicated geometry and their high geometric accuracy .

The combined application in a foundry practice of 3D-printing, computer optimization through a virtual casting and modern visualization, by color scales and comparisons allows to be obtained details free of defects from the very first casting. One specific example for a fast optimized casting of a crankcase of aluminum alloy for a turbocharger is shown. The geometry of the detail is of high complexity, developed internal cavities and various wall thicknesses. With the use of three advanced software products, the time to reach the above goal is shortened by about two months and the minimum density in a critical point is increased almost 3 times

The aim of this work is to present the influence of anodic surface treatment parameters on thickness and structure of an anodic layer formed on aluminum products.
The materials used in this study are the aluminum products from Alumil Company in Albania. The analyses of samples were performed using Optical Microscopy (Leica DMI 5000 M) for characterization of macrostructure of anodizing layer and Vickers micro-hardness (HMV-2 tester) of non-anodized aluminum products and anodized aluminum products. Aluminum product of the series A6060 are taken in Alumil Company in Albania. Comparing the results in this research (analyses) we have concluded the characteristics of anodizing layer in the aluminum product, which have improved and increase their surface and product performance.

Incremental sheet metal forming has been well-known as one of the flexible methods of forming metallic sheets, suitable for the production of prototypes or small batch sizes. Apprehending the deformation method in forming processes and selection of route parameters to avoid part failure are of vital importance, because marketing needs standard sound parts in a shortest possible time. This paper presents the study on the use of finite element modeling of incremental sheet metal forming of Al 1100 aluminum alloy to investigate the effect of tool diameter and step over on the forming induced stresses, part thickness distribution and forming forces. The results of finite element analysis are compared with experimental data while producing truncated pyramid parts. It has been shown that the developed finite element model is capable of providing reliable results in the prediction of the final thickness of the part, which matches the experimental results with a maximum discrepancy of 8%.

Incremental sheet metal forming has been well-known as one of the flexible methods of forming metallic sheets, suitable for the production of prototypes or small batch sizes. Apprehending the deformation method in forming processes and selection of route parameters to avoid part failure are of vital importance, because marketing needs standard sound parts in a shortest possible time. This paper presents the study on the use of finite element modeling of incremental sheet metal forming of Al 1100 aluminum alloy to investigate the effect of tool diameter and step over on the forming induced stresses, part thickness distribution and forming forces. The results of finite element analysis are compared with experimental data while producing truncated pyramid parts. It has been shown that the developed finite element model is capable of providing reliable results in the prediction of the final thickness of the part, which matches the experimental results with a maximum discrepancy of 8%.